500 Internal Server Error Sending email

Your software
My Mautic version is: 3
My PHP version is: 7.4.28
My Database type and version is: 5.7.23-23

Your problem
My problem is: I can’t send emails.

These errors are showing in the log: mautic.CRITICAL: Uncaught PHP Exception Swift_RfcComplianceException: “Address set in PathHeader does not comply with addr-spec of RFC 2822.”

Steps I have tried to fix the problem: I don’t know to fix it, I’m new in Mautic.

What is your sending method? Are you using your own SMTP? Maybe Amazon or Sendgrid?

I’m using my own SMTP

I suspect this to be a setting issue with your own SMTP :frowning:

Thank you for helping me. I reached the support host team and It seems to be some problem with the server, if not I’ll come back here.