I can send and receive mail using firstname.lastname@example.org, but system generated emails such as email@example.com bounce backup with an error:
May 1 03:14:52 mail postfix/smtp: 23CA4BD6B40: to=, relay=none, delay=0.01, delays=0/0/0/0, dsn=5.4.6, status=bounced (mail for mail.example.com loops back to myself)
How do I fix this error?
Q. I’ve recently changed email user account password using passwd command, for one my postfix email server which requires SMTP authentication before sending an email. Now following error is logged into my /var/log/maillog file: ERROR: Password not accepted from server: 535 5.7.0 Error: authentication failed: authentication failure How do I solve this problem under Red [...]