I am trying to flesh mails from /var/spool/mqueue using,
/usr/lib/sendmail -q -v

errors:-
host name lookup failure
Sender address rejected
Domain not found
Deferred
Closing connection
no valid recipients
No route to host
etc.....

ls -l | wc -l
192 --mails are there under the /var/spool/mqueue path with 868K.

How to deal with it?.

Read the errors:

host name lookup failure - The MX record for the destinations domain probably contains a dummy/silly host
Sender address rejected - The receiving mail server doesn't like you.
Domain not found - Trying to send to a non-existant domain.
Deferred - Something else happened, this mail will be resent at some point
Closing connection - Remote end closed the connection without accepting the mail
no valid recipients - Remote end can't find the person you're sending to
No route to host - Your system can't make a connection to the remote end, may be a network issue or something.
etc..... - etc.

Postfix will retry delivery and eventually give up and delete the mail from the queue.

It would be normal for a busy mail server to have a number of these mails sitting in the queue.

1 members found this post helpful.

Thank a lot.