Lists:
> Hi all,
>
> Setup is: we have a server that does the spam checking running
> MailScanner / Spamassassin and of course postfix
>
> Mail is then delivered to a machine running MailEnable (where the boxes
> are held)
>
> We had a situation where the MailEnable machine went down
>
> *In the maillog of the server running postfix were:*
> Oct 29 08:42:08 postfix/smtp[3619]: 37D5362E8A0:
> to=<[email protected]>,
> relay=ipofmailenableserver[ipofmailenableserver]:25, delay=0.98,
> delays=0.93/0/0/0.05, dsn=5.7.1, status=bounced (host
> ipofmailenableserver[ipofmailenableserver] said: 550 5.7.1 Unable to
> relay for [email protected] (in reply to RCPT TO command))
> Oct 29 08:42:08 postfix/cleanup[3449]: 2B11F62E8A2:
> message-id=<[email protected]>
> Oct 29 08:42:08 postfix/qmgr[29235]: 2B11F62E8A2: from=<>, size=14216,
> nrcpt=1 (queue active)
> Oct 29 08:42:08 postfix/bounce[4201]: 37D5362E8A0: sender non-delivery
> notification: 2B11F62E8A2
> Oct 29 08:42:08 postfix/qmgr[29235]: 37D5362E8A0: removed
> Oct 29 08:42:08 postfix/smtp[3619]: 2B11F62E8A2:
> to=<[email protected]>,
> relay=ipofmailenableserver[ipofmailenableserver]:25, delay=0.05,
> delays=0/0/0/0.04, dsn=5.7.1, status=bounced (host
> ipofmailenableserver[ipofmailenableserver] said: 550 5.7.1 Unable to
> relay for [email protected] (in reply to RCPT TO command))
> Oct 29 08:42:08 postfix/qmgr[29235]: 2B11F62E8A2: removed
>
> Neither the original recipient or the original sender received
> notification that there was a problem or any form of bounce message. The
> original recipient also never received the email.
Indeed. The original message was rejected with a permanent error
("550 5.7.1 Unable to relay"), as was the non-delivery notification.
> My question is what happened to the email and the bounces and how can I
> change the setup so that if this occured in the future (i.e. the spam
> checking server can't communicate with the mailenable server) mail does
> not disappear.
Configure the Mailenable system such that it doesn't reject mail
with a PERMANENT error for conditions that you don't consider
permanent.
You can configure the Postfix SMTP client to pretend that permanent
errors aren't permanent, but that introduces other risks.
Wietse
