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[Mailer] Improve error message when SMTP server lacks SMTPUTF8 support #64186

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[Mailer] Improve error message when SMTP server lacks SMTPUTF8 support #64186

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[Mailer] Improve error message when SMTP server lacks SMTPUTF8 support
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@ousamabenyounes
ousamabenyounes committed May 11, 2026
commit d198cf8f2be4ddc1f695d552839fceab66cdd726
2 changes: 1 addition & 1 deletion src/Symfony/Component/Mailer/Tests/Transport/Smtp/EsmtpTransportTest.php
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Expand Up @@ -90,7 +90,7 @@ public function testMissingSmtpUtf8()
$message->text('.');

$this->expectException(InvalidArgumentException::class);
$this->expectExceptionMessage('Invalid addresses: non-ASCII characters not supported in local-part of email.');
$this->expectExceptionMessage('The SMTP server does not support the SMTPUTF8 extension required to send to addresses with non-ASCII characters in their local-part.');
$transport->send($message);
}

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2 changes: 1 addition & 1 deletion src/Symfony/Component/Mailer/Transport/Smtp/SmtpTransport.php
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Expand Up @@ -247,7 +247,7 @@ private function doHeloCommand(): void
private function doMailFromCommand(string $address, bool $smtputf8): void
{
if ($smtputf8 && !$this->serverSupportsSmtpUtf8()) {
throw new InvalidArgumentException('Invalid addresses: non-ASCII characters not supported in local-part of email.');
throw new InvalidArgumentException('The SMTP server does not support the SMTPUTF8 extension required to send to addresses with non-ASCII characters in their local-part.');
}
$this->executeCommand(\sprintf("MAIL FROM:<%s>%s\r\n", $address, $smtputf8 ? ' SMTPUTF8' : ''), [250]);
}
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