Symfony version(s) affected

6.3.2

Description

I am using symfony/mailgun-mailer (latest 6.3.2).

I have a subdomain set up: mg.domain.com and I send emails from user@domain.com. This should work when all dkim and spf align. However, the headers are not set correctly.

There is this issue with exact description of the problem and this solution

Can we please add this header as well?

How to reproduce

• Create a subdomain in Mailgun like mg,domain.com
• Send an email to a Microsoft email from user@domain.com

Possible Solution

https://stackoverflow.com/a/45445015/397646

Additional Context

No response