On 4/24/2014 7:41 PM, Sam Varshavchik wrote: > Bowie Bailey writes: > >> My new Courier server is up and running. I'm not seeing any problems >> with mail coming in or out of the server, but my monitoring systems keep >> complaining about timeouts on port 25 two or three times a day. >> >> Since this is so random and intermittent, I'm not sure how to >> troubleshoot it. Any suggestions? > Look at your mail volume. Look at /var/log/maillog around the time your > monitoring system is complaining. > > When the number of connections reaches the maximum configurable number of > connections, no more connections are accepted. Anything that tries to > connect will time out if none of the existing connections drop off quickly > enough. > > Courier will issue its own warnings when the maximum number of connections > is reached, in /var/log/maillog, so it's pretty easy to confirm whether > that's the case.
This server is pretty low-volume, but I checked it anyway. I didn't see any errors about maximum number of connections. In fact, yesterday morning, I got notices about timeouts at 1:14, 1:15, and 1:16. When I checked the logs, there were a grand total of 37 smtp connections made between 1:10 and 1:20 (courieresmtpd: started,ip=). And 11 of those were from my monitoring system. There was a burst of 14 connections from the same IP between 1:13:47 and 1:14:01, but I wouldn't expect 14 connections to cause a problem. Besides, I can't even find that much traffic in some of the other time periods. Any other suggestions? -- Bowie ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ courier-users mailing list courier-users@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
