Postfix email error - smtp; 550 Return Path not verifiable
Posted on 2008-11-11
I have user on my system that is trying to send an email but it keeps getting returned/rejected by the recipient:
Here is the error message from the MAILER-DAEMON:
Reporting-MTA: dns; servername.domain.com
X-Postfix-Sender: rfc822; firstname.lastname@example.org
Arrival-Date: Tue, 11 Nov 2008 08:53:32 -0500 (ECT)
Final-Recipient: rfc822; email@example.com
Remote-MTA: dns; zebra.dancom.com
Diagnostic-Code: smtp; 550 Return Path not verifiable
Is this on my end?
User has been able to send messages to this address before, but not since yesterday.