For well over a year and half I have had two incoming mail servers
running postfix + amavisd + spamassassin + clamd on a CentOS 7 system
working flawlessly. Over the past two days something has happened such
that the postfix stops delivering messages to user inboxes with this
message:
Jun 8 19:37:05 mx01 postfix/error[22985]: 7B867836338F:
to=<xx...@xxxxxx.net>, relay=none, delay=295, delays=0.49/294/0/0.05,
dsn=4.4.2, status=deferred (delivery temporarily suspended: conversation
with 127.0.0.1[127.0.0.1] timed out while receiving the initial server
greeting)
For whatever reason it appears that the clamd stops working and the
backup clamscan does not takeover. As a result postfix stops mail
delivery and begins to queue messages. When I restart amavisd and then
flush the postfix queue the messages begin to be delivered again. Then
for several hours everything works normally until some event causes
clamd to stop again and the messages begin to queue again.
I have no idea where to begin to debug this problem. For the time being
I created a cron job to fix the problem. But I definitely need to find
the root cause of the issue. What bugs me as that everything has worked
flawlessly for a year and a half and all of the sudden I have begun to
have problems. Other than the postfix error message I don't see anything
in the logs. Can anybody suggest a good way to debug the problem?
Also, has anybody else seen such a problem? If so, what did you do to
fix it?
--
Paul (ga...@nurdog.com)
Cell: (303)257-5208
