Symfony version(s) affected

5.4

Description

Hello,

We realised that emails we send through the Symfony Sendinblue integration do not contain all necessary headers.

Reply-To header is missing, To header is empty for example.

This breaks our workflow as we cannot specify a custom reply-to email address in some cases (notification that a person sent a message to one of our clients for example).

From what I see in SendinblueApiTransport, the whole email payload is nested in the json attribute of the HttpClientInterface call.

Sendinblue API reference lists all items separately : https://developers.sendinblue.com/reference/sendtransacemail

Is it possible that the integration does not send the payload correctly to Sendinblue?

Our emails sent through Mailgun do not encounter this issue, it appears only when sending through Sendinblue.

How to reproduce

• Create an account with Sendinblue
• Install the symfony/sendinblue-mailer package
• Create an Email with a custom Reply-To address and send it
• Check the presence or absence of Reply-To header in the email received.

Possible Solution

No response

Additional Context

No response