Undelivered Mail Returned to Sender auto email generated by postfix

Avatar sanwar 4 months, 1 week ago

I have mail delivery problem returned to sender address while email successfully reached to inbox.

"Undelivered Mail Returned to Sender"

This is the mail system at host mail.example.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

               The mail system

-o@example.com (expanded from <-o>): bad address syntax

<milter<em>macrodaemonname=ORIGINATING@example.com> (expanded from <milter< em="">macrodaemonname=ORIGINATING>): host
mail.example.com[private/dovecot-lmtp] said: 550 5.1.1
<milter<em>macro</milter<em></milter<>
daemonname=ORIGINATING@example.com> User doesn't exist: milter_macro_daemon_name=ORIGINATING@example.com (in reply
to RCPT TO command)
</milter<em>

reject@example.com (expanded from <reject>): host
mail.example.com[private/dovecot-lmtp] said: 550 5.1.1
reject@example.com User doesn't exist:
reject@example.com (in reply to RCPT TO command)</reject>

<smtpd<em>client</smtpd<em>restrictions=permitsaslauthenticated@example.com>
(expanded from <smtpd<em>clientrestrictions=permitsaslauthenticated>): host
mail.example.com[private/dovecot-lmtp] said: 550 5.1.1
<smtpd<em>clientrestrictions=permitsaslauthenticated@example.com>
User doesn't exist:
smtpd_clientrestrictions=permitsasl_authenticated@example.com
(in reply to RCPT TO command)</smtpd<em></smtpd<em>

<smtpd<em>saslauthenable=yes@example.com> (expanded from <smtpd< em="">saslauthenable=yes>): host
mail.example.com[private/dovecot-lmtp] said: 550 5.1.1
<smtpd<em>sasl</smtpd<em></smtpd<>
authenable=yes@example.com> User doesn't exist: smtpd_sasl_authenable=yes@example.com (in reply to RCPT TO
command)</smtpd<em>

<smtpd<em>tlssecuritylevel=encrypt@example.com> (expanded from <smtpd< em="">tlssecuritylevel=encrypt>): host
mail.example.com[private/dovecot-lmtp] said: 550 5.1.1
<smtpd<em>tls</smtpd<em></smtpd<>
security_level=encrypt@example.com> User doesn't
exist: smtpd_tls_security_level=encrypt@example.com (in
reply to RCPT TO command)</smtpd<em>

<syslog<em>name=postfix/submission@example.com> (expanded from <syslog< em="">name=postfix/submission>): host
mail.example.com[private/dovecot-lmtp] said: 550 5.1.1
<syslog_name=postfix submission@example.com=""> User doesn't
exist: syslog_name=postfix/submission@example.com (in reply
to RCPT TO command)</syslog_name=postfix></syslog<></syslog<em>

1 Reply

Hey there, to clarify are you saying that even though you are receiving this warning, the email is successfully reaching its end destination?

A good way to troubleshoot this might also be to take a look at the results of your mail log to see if there is anything there. You can run tail -n 20 /var/log/mail.log to generate a few lines of output that might provide a little more information.

If you can also share the contents of your main.cf file in a response we might be able to take a look and make sure there are no misconfigurations that are causing this specific message.

Thank you in advance!

Reply

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