Sender address rejected

Your software
My Mautic version is: v5.0.3
My PHP version is: 8.1.27
My Database type and version is:



Your problem
My problem is:

My email configuration is 100% correct. I am able to send the test email. But i am not able to send to my contacts.

These errors are showing in the log:

Failed to send to Expected response code “250/251/252” but got code “553”, with message “553 5.7.1 Sender address rejected: not owned by user”.

According to the error reported, your configuration is everything but OK.

Still according to the error reported, your sending server is explicitly forbidden to send emails on " []" behalf.

Double-check your DMARC, DKIM, RDNS and SPF. If you don’t see any problem, ask for someone else to take a look at it because there are at least 1 issue within your configuration (the error reported is DNS related and not Mautic related).

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Have you solved the problem?

I got the same error. My SMTP connection is working fine, but I cannot send e-mail. Even email test is not working.

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The solution is to allow sending “on behalf of” (it’s server side).

The issue should be brought to your sysadmin attention since it’s a server restriction (unrelated with Mautic)

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Yes Check your dns records it may be a problem.