diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index cf8bb8dfc5701..095d782aa12a3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -2589,6 +2589,7 @@ private function registerMailerConfiguration(array $config, ContainerBuilder $co
         if ($webhookEnabled) {
             $webhookRequestParsers = [
                 MailerBridge\Brevo\Webhook\BrevoRequestParser::class => 'mailer.webhook.request_parser.brevo',
+                MailerBridge\MailerSend\Webhook\MailerSendRequestParser::class => 'mailer.webhook.request_parser.mailersend',
                 MailerBridge\Mailgun\Webhook\MailgunRequestParser::class => 'mailer.webhook.request_parser.mailgun',
                 MailerBridge\Mailjet\Webhook\MailjetRequestParser::class => 'mailer.webhook.request_parser.mailjet',
                 MailerBridge\Postmark\Webhook\PostmarkRequestParser::class => 'mailer.webhook.request_parser.postmark',
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_webhook.php b/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_webhook.php
index 5c1014713112b..f9d2b9686ff03 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_webhook.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/mailer_webhook.php
@@ -13,6 +13,8 @@
 
 use Symfony\Component\Mailer\Bridge\Brevo\RemoteEvent\BrevoPayloadConverter;
 use Symfony\Component\Mailer\Bridge\Brevo\Webhook\BrevoRequestParser;
+use Symfony\Component\Mailer\Bridge\MailerSend\RemoteEvent\MailerSendPayloadConverter;
+use Symfony\Component\Mailer\Bridge\MailerSend\Webhook\MailerSendRequestParser;
 use Symfony\Component\Mailer\Bridge\Mailgun\RemoteEvent\MailgunPayloadConverter;
 use Symfony\Component\Mailer\Bridge\Mailgun\Webhook\MailgunRequestParser;
 use Symfony\Component\Mailer\Bridge\Mailjet\RemoteEvent\MailjetPayloadConverter;
@@ -31,6 +33,11 @@
             ->args([service('mailer.payload_converter.brevo')])
         ->alias(BrevoRequestParser::class, 'mailer.webhook.request_parser.brevo')
 
+        ->set('mailer.payload_converter.mailersend', MailerSendPayloadConverter::class)
+        ->set('mailer.webhook.request_parser.mailersend', MailerSendRequestParser::class)
+            ->args([service('mailer.payload_converter.mailersend')])
+        ->alias(MailerSendRequestParser::class, 'mailer.webhook.request_parser.mailersend')
+
         ->set('mailer.payload_converter.mailgun', MailgunPayloadConverter::class)
         ->set('mailer.webhook.request_parser.mailgun', MailgunRequestParser::class)
             ->args([service('mailer.payload_converter.mailgun')])
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/CHANGELOG.md b/src/Symfony/Component/Mailer/Bridge/MailerSend/CHANGELOG.md
index 1f2c8f86cde72..45273cc83c340 100644
--- a/src/Symfony/Component/Mailer/Bridge/MailerSend/CHANGELOG.md
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+7.1
+---
+
+ * Add support for `RemoteEvent` and `Webhook`
+
 6.3
 ---
 
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/RemoteEvent/MailerSendPayloadConverter.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/RemoteEvent/MailerSendPayloadConverter.php
new file mode 100644
index 0000000000000..7ef67b1d5dacd
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/RemoteEvent/MailerSendPayloadConverter.php
@@ -0,0 +1,105 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mailer\Bridge\MailerSend\RemoteEvent;
+
+use Symfony\Component\RemoteEvent\Event\Mailer\AbstractMailerEvent;
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerDeliveryEvent;
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
+use Symfony\Component\RemoteEvent\Exception\ParseException;
+use Symfony\Component\RemoteEvent\PayloadConverterInterface;
+
+/**
+ * @author WoutervanderLoop.nl <info@woutervanderloop.nl>
+ */
+final class MailerSendPayloadConverter implements PayloadConverterInterface
+{
+    public function convert(array $payload): AbstractMailerEvent
+    {
+        if (\in_array($payload['type'], ['activity.sent', 'activity.delivered', 'activity.soft_bounced', 'activity.hard_bounced'], true)) {
+            $name = match ($payload['type']) {
+                'activity.sent' => MailerDeliveryEvent::RECEIVED,
+                'activity.delivered' => MailerDeliveryEvent::DELIVERED,
+                'activity.soft_bounced', 'activity.hard_bounced' => MailerDeliveryEvent::BOUNCE,
+            };
+            $event = new MailerDeliveryEvent($name, $this->getMessageId($payload), $payload);
+            $event->setReason($this->getReason($payload));
+        } else {
+            $name = match ($payload['type']) {
+                'activity.clicked', 'activity.clicked_unique' => MailerEngagementEvent::CLICK,
+                'activity.unsubscribed' => MailerEngagementEvent::UNSUBSCRIBE,
+                'activity.opened', 'activity.opened_unique' => MailerEngagementEvent::OPEN,
+                'activity.spam_complaint' => MailerEngagementEvent::SPAM,
+                default => throw new ParseException(sprintf('Unsupported event "%s".', $payload['type'])),
+            };
+            $event = new MailerEngagementEvent($name, $this->getMessageId($payload), $payload);
+        }
+
+        if (!$date = \DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', $payload['created_at'])) {
+            throw new ParseException(sprintf('Invalid date "%s".', $payload['created_at']));
+        }
+
+        $event->setDate($date);
+        $event->setRecipientEmail($this->getRecipientEmail($payload));
+        $event->setMetadata($this->getMetadata($payload));
+        $event->setTags($this->getTags($payload));
+
+        return $event;
+    }
+
+    private function getMessageId(array $payload): string
+    {
+        return $payload['data']['email']['message']['id'];
+    }
+
+    private function getRecipientEmail(array $payload): string
+    {
+        return $payload['data']['email']['recipient']['email'];
+    }
+
+    private function getReason(array $payload): string
+    {
+        if (isset($payload['data']['morph']['readable_reason'])) {
+            return $payload['data']['morph']['readable_reason'];
+        }
+
+        if (isset($payload['data']['morph']['reason'])) {
+            return $payload['data']['morph']['reason'];
+        }
+
+        return '';
+    }
+
+    private function getTags(array $payload): array
+    {
+        return $payload['data']['email']['tags'] ?? [];
+    }
+
+    private function getMetadata(array $payload): array
+    {
+        $morphObject = $payload['data']['morph']['object'] ?? null;
+
+        return match ($morphObject) {
+            'open' => [
+                'ip' => $payload['data']['morph']['ip'] ?? null
+            ],
+            'click' => [
+                'ip' => $payload['data']['morph']['ip'] ?? null,
+                'url' => $payload['data']['morph']['url'] ?? null,
+            ],
+            'recipient_unsubscribe' => [
+                'reason' => $payload['data']['morph']['reason'] ?? null,
+                'readable_reason' => $payload['data']['morph']['readable_reason'] ?? null,
+            ],
+            default => [],
+        };
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked.json
new file mode 100644
index 0000000000000..2857de9c0b64d
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked.json
@@ -0,0 +1,42 @@
+{
+    "type": "activity.clicked",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "clicked",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "delivered",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "click",
+            "id": "62fb9215f2481f74e3085356",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "ip": "127.0.0.1",
+            "url": "https://www.mailersend.com"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked.php
new file mode 100644
index 0000000000000..5ca285288014a
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked.php
@@ -0,0 +1,14 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
+
+$wh = new MailerEngagementEvent(MailerEngagementEvent::CLICK, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([
+    'ip' => '127.0.0.1',
+    'url' => 'https://www.mailersend.com'
+]);
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked_unique.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked_unique.json
new file mode 100644
index 0000000000000..9cb5ed17af3b8
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked_unique.json
@@ -0,0 +1,42 @@
+{
+    "type": "activity.clicked_unique",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "clicked_unique",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "delivered",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "click",
+            "id": "62fb9215f2481f74e3085356",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "ip": "127.0.0.1",
+            "url": "https://www.mailersend.com"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked_unique.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked_unique.php
new file mode 100644
index 0000000000000..5ca285288014a
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/clicked_unique.php
@@ -0,0 +1,14 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
+
+$wh = new MailerEngagementEvent(MailerEngagementEvent::CLICK, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([
+    'ip' => '127.0.0.1',
+    'url' => 'https://www.mailersend.com'
+]);
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/delivered.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/delivered.json
new file mode 100644
index 0000000000000..eb924779ee895
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/delivered.json
@@ -0,0 +1,36 @@
+{
+    "type": "activity.delivered",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "delivered",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "delivered",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": null,
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/delivered.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/delivered.php
new file mode 100644
index 0000000000000..62558144c06aa
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/delivered.php
@@ -0,0 +1,12 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerDeliveryEvent;
+
+$wh = new MailerDeliveryEvent(MailerDeliveryEvent::DELIVERED, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([]);
+$wh->setReason('');
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/hard_bounced.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/hard_bounced.json
new file mode 100644
index 0000000000000..d59a3bcefee38
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/hard_bounced.json
@@ -0,0 +1,39 @@
+{
+    "type": "activity.hard_bounced",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "hard_bounced",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "rejected",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "recipient_bounce",
+            "reason": "Host or domain name not found"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/hard_bounced.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/hard_bounced.php
new file mode 100644
index 0000000000000..06dd15ff42b70
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/hard_bounced.php
@@ -0,0 +1,12 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerDeliveryEvent;
+
+$wh = new MailerDeliveryEvent(MailerDeliveryEvent::BOUNCE, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([]);
+$wh->setReason('Host or domain name not found');
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened.json
new file mode 100644
index 0000000000000..9b5aac7905bca
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened.json
@@ -0,0 +1,41 @@
+{
+    "type": "activity.opened",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "opened",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "delivered",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "open",
+            "id": "62fb9151f2481f74e3085352",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "ip": "127.0.0.1"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened.php
new file mode 100644
index 0000000000000..8deb1ca7ceb03
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened.php
@@ -0,0 +1,13 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
+
+$wh = new MailerEngagementEvent(MailerEngagementEvent::OPEN, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([
+    'ip' => '127.0.0.1'
+]);
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened_unique.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened_unique.json
new file mode 100644
index 0000000000000..7323512a83927
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened_unique.json
@@ -0,0 +1,41 @@
+{
+    "type": "activity.opened_unique",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "opened_unique",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "delivered",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "open",
+            "id": "62fb9151f2481f74e3085352",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "ip": "127.0.0.1"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened_unique.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened_unique.php
new file mode 100644
index 0000000000000..8deb1ca7ceb03
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/opened_unique.php
@@ -0,0 +1,13 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
+
+$wh = new MailerEngagementEvent(MailerEngagementEvent::OPEN, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([
+    'ip' => '127.0.0.1'
+]);
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/sent.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/sent.json
new file mode 100644
index 0000000000000..3d846979eeb94
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/sent.json
@@ -0,0 +1,36 @@
+{
+    "type": "activity.sent",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "sent",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "sent",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": null,
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/sent.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/sent.php
new file mode 100644
index 0000000000000..519813c9a39c5
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/sent.php
@@ -0,0 +1,12 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerDeliveryEvent;
+
+$wh = new MailerDeliveryEvent(MailerDeliveryEvent::RECEIVED, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([]);
+$wh->setReason('');
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/soft_bounced.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/soft_bounced.json
new file mode 100644
index 0000000000000..27a3facf73c56
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/soft_bounced.json
@@ -0,0 +1,39 @@
+{
+    "type": "activity.soft_bounced",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "soft_bounced",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "rejected",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "recipient_bounce",
+            "reason": "Unknown reason"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/soft_bounced.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/soft_bounced.php
new file mode 100644
index 0000000000000..0973e3cd637f6
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/soft_bounced.php
@@ -0,0 +1,12 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerDeliveryEvent;
+
+$wh = new MailerDeliveryEvent(MailerDeliveryEvent::BOUNCE, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([]);
+$wh->setReason('Unknown reason');
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/spam_complaint.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/spam_complaint.json
new file mode 100644
index 0000000000000..a63d796ecd2bc
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/spam_complaint.json
@@ -0,0 +1,38 @@
+{
+    "type": "activity.spam_complaint",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "spam_complaint",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "delivered",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "spam_complaint"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/spam_complaint.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/spam_complaint.php
new file mode 100644
index 0000000000000..7bd73b9fa97d1
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/spam_complaint.php
@@ -0,0 +1,11 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
+
+$wh = new MailerEngagementEvent(MailerEngagementEvent::SPAM, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([]);
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/unsubscribed.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/unsubscribed.json
new file mode 100644
index 0000000000000..4c7c7ee22cb68
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/unsubscribed.json
@@ -0,0 +1,40 @@
+{
+    "type": "activity.unsubscribed",
+    "domain_id": "7z3m5jgrogdpyo6n",
+    "created_at": "2024-01-01T12:00:00.000000Z",
+    "webhook_id": "7z3m5jgrogdpyo6n",
+    "url": "https://www.mailersend.com/webhook",
+    "data": {
+        "object": "activity",
+        "id": "62f114f8165fe0d8db0288e5",
+        "type": "unsubscribed",
+        "created_at": "2024-01-01T12:00:00.000000Z",
+        "email": {
+            "object": "email",
+            "id": "62f114f7165fe0d8db0288e2",
+            "created_at": "2024-01-01T12:00:00.000000Z",
+            "from": "test@mailersend.com",
+            "subject": "Test subject",
+            "status": "delivered",
+            "tags": ["test-tag"],
+            "headers": null,
+            "message": {
+                "object": "message",
+                "id": "62fb66bef54a112e920b5493",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            },
+            "recipient": {
+                "object": "recipient",
+                "id": "62c69be104270ee9c0074d32",
+                "email": "test@example.com",
+                "created_at": "2024-01-01T12:00:00.000000Z"
+            }
+        },
+        "morph": {
+            "object": "recipient_unsubscribe",
+            "reason": "NO_LONGER_WANT",
+            "readable_reason": "I no longer want to receive these emails"
+        },
+        "template_id": "0z76k5jg0o3yeg2d"
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/unsubscribed.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/unsubscribed.php
new file mode 100644
index 0000000000000..45e7a63beb16b
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/Fixtures/unsubscribed.php
@@ -0,0 +1,14 @@
+<?php
+
+use Symfony\Component\RemoteEvent\Event\Mailer\MailerEngagementEvent;
+
+$wh = new MailerEngagementEvent(MailerEngagementEvent::UNSUBSCRIBE, '62fb66bef54a112e920b5493', json_decode(file_get_contents(str_replace('.php', '.json', __FILE__)), true));
+$wh->setRecipientEmail('test@example.com');
+$wh->setTags(["test-tag"]);
+$wh->setMetadata([
+    'reason' => 'NO_LONGER_WANT',
+    'readable_reason' => 'I no longer want to receive these emails'
+]);
+$wh->setDate(\DateTimeImmutable::createFromFormat('Y-m-d\TH:i:s.u\Z', '2024-01-01T12:00:00.000000Z'));
+
+return $wh;
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendMissingSignatureRequestParserTest.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendMissingSignatureRequestParserTest.php
new file mode 100644
index 0000000000000..010b451a1462e
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendMissingSignatureRequestParserTest.php
@@ -0,0 +1,53 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mailer\Bridge\MailerSend\Tests\Webhook;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Mailer\Bridge\MailerSend\RemoteEvent\MailerSendPayloadConverter;
+use Symfony\Component\Mailer\Bridge\MailerSend\Webhook\MailerSendRequestParser;
+use Symfony\Component\Webhook\Client\RequestParserInterface;
+use Symfony\Component\Webhook\Exception\RejectWebhookException;
+use Symfony\Component\Webhook\Test\AbstractRequestParserTestCase;
+
+class MailerSendMissingSignatureRequestParserTest extends AbstractRequestParserTestCase
+{
+    protected function createRequestParser(): RequestParserInterface
+    {
+        $this->expectException(RejectWebhookException::class);
+        $this->expectExceptionMessage('Signature is required.');
+
+        return new MailerSendRequestParser(new MailerSendPayloadConverter());
+    }
+
+    public static function getPayloads(): iterable
+    {
+        $filename = 'sent.json';
+        $currentDir = \dirname((new \ReflectionClass(static::class))->getFileName());
+
+        yield $filename => [
+            file_get_contents($currentDir . '/Fixtures/sent.json'),
+            include($currentDir . '/Fixtures/sent.php'),
+        ];
+    }
+
+    protected function getSecret(): string
+    {
+        return 'GvLY88Uyj70jQm3fUwYyWmAaiz98wWim';
+    }
+
+    protected function createRequest(string $payload): Request
+    {
+        return Request::create('/', 'POST', [], [], [], [
+            'Content-Type' => 'application/json',
+        ], $payload);
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendRequestParserTest.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendRequestParserTest.php
new file mode 100644
index 0000000000000..1f8230b97ce64
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendRequestParserTest.php
@@ -0,0 +1,25 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mailer\Bridge\MailerSend\Tests\Webhook;
+
+use Symfony\Component\Mailer\Bridge\MailerSend\RemoteEvent\MailerSendPayloadConverter;
+use Symfony\Component\Mailer\Bridge\MailerSend\Webhook\MailerSendRequestParser;
+use Symfony\Component\Webhook\Client\RequestParserInterface;
+use Symfony\Component\Webhook\Test\AbstractRequestParserTestCase;
+
+class MailerSendRequestParserTest extends AbstractRequestParserTestCase
+{
+    protected function createRequestParser(): RequestParserInterface
+    {
+        return new MailerSendRequestParser(new MailerSendPayloadConverter());
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendSignedRequestParserTest.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendSignedRequestParserTest.php
new file mode 100644
index 0000000000000..9553e989752e1
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendSignedRequestParserTest.php
@@ -0,0 +1,56 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mailer\Bridge\MailerSend\Tests\Webhook;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Mailer\Bridge\MailerSend\RemoteEvent\MailerSendPayloadConverter;
+use Symfony\Component\Mailer\Bridge\MailerSend\Webhook\MailerSendRequestParser;
+use Symfony\Component\Webhook\Client\RequestParserInterface;
+use Symfony\Component\Webhook\Exception\RejectWebhookException;
+use Symfony\Component\Webhook\Test\AbstractRequestParserTestCase;
+
+class MailerSendSignedRequestParserTest extends AbstractRequestParserTestCase
+{
+    protected function createRequestParser(): RequestParserInterface
+    {
+        return new MailerSendRequestParser(new MailerSendPayloadConverter());
+    }
+
+    public static function getPayloads(): iterable
+    {
+        $filename = 'sent.json';
+        $currentDir = \dirname((new \ReflectionClass(static::class))->getFileName());
+
+        yield $filename => [
+            file_get_contents($currentDir . '/Fixtures/sent.json'),
+            include($currentDir . '/Fixtures/sent.php'),
+        ];
+    }
+
+    protected function getSecret(): string
+    {
+        return 'GvLY88Uyj70jQm3fUwYyWmAaiz98wWim';
+    }
+
+    protected function createRequest(string $payload): Request
+    {
+        return Request::create(
+            uri: '/',
+            method: 'POST',
+            server: [
+                'Content-Type' => 'application/json',
+                'HTTP_Signature' => 'e60f87b019f0aaae29042b14762991765ebb0cd6f6d42884af9fccca4cbd16e7'
+            ],
+            content: str_replace("\n", "", $payload)
+        );
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendWrongSecretRequestParserTest.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendWrongSecretRequestParserTest.php
new file mode 100644
index 0000000000000..fe64118cba141
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Tests/Webhook/MailerSendWrongSecretRequestParserTest.php
@@ -0,0 +1,59 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mailer\Bridge\MailerSend\Tests\Webhook;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Mailer\Bridge\MailerSend\RemoteEvent\MailerSendPayloadConverter;
+use Symfony\Component\Mailer\Bridge\MailerSend\Webhook\MailerSendRequestParser;
+use Symfony\Component\Webhook\Client\RequestParserInterface;
+use Symfony\Component\Webhook\Exception\RejectWebhookException;
+use Symfony\Component\Webhook\Test\AbstractRequestParserTestCase;
+
+class MailerSendWrongSecretRequestParserTest extends AbstractRequestParserTestCase
+{
+    protected function createRequestParser(): RequestParserInterface
+    {
+        $this->expectException(RejectWebhookException::class);
+        $this->expectExceptionMessage('Signature is wrong.');
+
+        return new MailerSendRequestParser(new MailerSendPayloadConverter());
+    }
+
+    public static function getPayloads(): iterable
+    {
+        $filename = 'sent.json';
+        $currentDir = \dirname((new \ReflectionClass(static::class))->getFileName());
+
+        yield $filename => [
+            file_get_contents($currentDir . '/Fixtures/sent.json'),
+            include($currentDir . '/Fixtures/sent.php'),
+        ];
+    }
+
+    protected function getSecret(): string
+    {
+        return 'wrong_secret';
+    }
+
+    protected function createRequest(string $payload): Request
+    {
+        return Request::create(
+            uri: '/',
+            method: 'POST',
+            server: [
+                'Content-Type' => 'application/json',
+                'HTTP_Signature' => 'e60f87b019f0aaae29042b14762991765ebb0cd6f6d42884af9fccca4cbd16e7'
+            ],
+            content: str_replace("\n", "", $payload)
+        );
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/Webhook/MailerSendRequestParser.php b/src/Symfony/Component/Mailer/Bridge/MailerSend/Webhook/MailerSendRequestParser.php
new file mode 100644
index 0000000000000..959b321da2da7
--- /dev/null
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/Webhook/MailerSendRequestParser.php
@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Mailer\Bridge\MailerSend\Webhook;
+
+use Symfony\Component\HttpFoundation\ChainRequestMatcher;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestMatcher\IsJsonRequestMatcher;
+use Symfony\Component\HttpFoundation\RequestMatcher\MethodRequestMatcher;
+use Symfony\Component\HttpFoundation\RequestMatcherInterface;
+use Symfony\Component\Mailer\Bridge\MailerSend\RemoteEvent\MailerSendPayloadConverter;
+use Symfony\Component\RemoteEvent\Event\Mailer\AbstractMailerEvent;
+use Symfony\Component\RemoteEvent\Exception\ParseException;
+use Symfony\Component\Webhook\Client\AbstractRequestParser;
+use Symfony\Component\Webhook\Exception\RejectWebhookException;
+
+final class MailerSendRequestParser extends AbstractRequestParser
+{
+    public function __construct(
+        private readonly MailerSendPayloadConverter $converter,
+    ) {
+    }
+
+    protected function getRequestMatcher(): RequestMatcherInterface
+    {
+        return new ChainRequestMatcher([
+            new MethodRequestMatcher('POST'),
+            new IsJsonRequestMatcher(),
+        ]);
+    }
+
+    protected function doParse(Request $request, #[\SensitiveParameter] string $secret): ?AbstractMailerEvent
+    {
+        if ($secret) {
+            if (!$request->headers->get('Signature')) {
+                throw new RejectWebhookException(406, 'Signature is required.');
+            }
+
+            $this->validateSignature(
+                $request->headers->get('Signature'),
+                $request->getContent(),
+                $secret,
+            );
+        }
+
+        $content = $request->toArray();
+        if (!isset($content['type'], $content['data']['email']['message']['id'], $content['data']['email']['recipient']['email'])) {
+            throw new RejectWebhookException(406, 'Payload is malformed.');
+        }
+
+        try {
+            return $this->converter->convert($content);
+        } catch (ParseException $e) {
+            throw new RejectWebhookException(406, $e->getMessage(), $e);
+        }
+    }
+
+    private function validateSignature(string $signature, string $payload, #[\SensitiveParameter] string $secret): void
+    {
+        // see https://developers.mailersend.com/api/v1/webhooks.html#security
+        $computedSignature = hash_hmac('sha256', $payload, $secret);
+
+        if (!hash_equals($signature, $computedSignature)) {
+            throw new RejectWebhookException(406, 'Signature is wrong.');
+        }
+    }
+}
diff --git a/src/Symfony/Component/Mailer/Bridge/MailerSend/composer.json b/src/Symfony/Component/Mailer/Bridge/MailerSend/composer.json
index 144c50ac44149..4a9b3946f2723 100644
--- a/src/Symfony/Component/Mailer/Bridge/MailerSend/composer.json
+++ b/src/Symfony/Component/Mailer/Bridge/MailerSend/composer.json
@@ -24,7 +24,8 @@
         "symfony/mailer": "^6.4|^7.0"
     },
     "require-dev": {
-        "symfony/http-client": "^6.4|^7.0"
+        "symfony/http-client": "^6.4|^7.0",
+        "symfony/webhook": "^6.3|^7.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Mailer\\Bridge\\MailerSend\\": "" },