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I am (or was) running sendmail 8.11.6 on a 2.4.20 kernel (Red Hat Linux 7.3). The installation has been running without problems for many months. A few days ago, upon reboot, sendmail began failing with the following entries in maillog:
Aug 21 12:12:40 mymachine sendmail: starting daemon (8.11.6): SMTP+queueing@01:00:00
Aug 21 12:12:40 mymachine sendmail: NOQUEUE: SYSERR(root): opendaemonsocket: daemon MTA: cannot bind: Cannot assign requested address
Aug 21 12:12:40 mymachine sendmail: daemon MTA: problem creating SMTP socket
Aug 21 12:12:45 mymachine sendmail: NOQUEUE: SYSERR(root): opendaemonsocket: daemon MTA: cannot bind: Cannot assign requested address
Aug 21 12:12:45 mymachine sendmail: daemon MTA: problem creating SMTP socket
[The above repeated at 5 second intervals 10 times]
Aug 21 12:13:30 mymachine sendmail: NOQUEUE: SYSERR(root): opendaemonsocket: daemon MTA: server SMTP socket wedged: exiting
Has anyone seen anything like this? This is sort of "out of the blue"; all other services are working OK, and the only recent change is a NIC replacement (previous NIC damaged during blackout.) I'm willing to send more info if any sendmail experts out there would like. Thanks!
-Scott Wagner, Rochester NY US
I found the answer to this one - it seems my eth1: interface, which acqures its ip address via DHCP, conflicted with an entry:
O DaemonPortOptions=Port=smtp,Addr=a.b.c.d, Name=MTA
in my /etc/sendmail.cf .
When I manually fixed the DaemonPortOptions entry in sendmail.cf, sendmail worked fine.
I still have to figure out how to keep the DaemonPortOptions entry synchronized with the (DHCP-assigned) ip address.
Scott, do you update a DNS name after you get a new one from DHCP? I.E. do you use DynDNS or similar service? If so, you should be able to use that named address instead of a numbered one. The only problem with that approach is that it may take a few minutes until sendmail will start correctly while the address gets the update and is propogated to your upstream DNS provider(s). In fact, I hourly retart sendmail in a cron.hourly script for that reason and it seems to help. Perhaps there's a better solution?