How did you decide this is a network issue? How would you go about determining which router which switch?
Thanks for your help. On Tue, Oct 29, 2013 at 4:33 PM, li...@rhsoft.net <li...@rhsoft.net> wrote: > > > Am 29.10.2013 21:25, schrieb Roman Gelfand: >> The client is thunderbird. Correct me if I am wrong, it appears it 40 >> seconds for the client to hand over the email to the server? If so, >> where should I troubleshoot? are there maintenance >> tasks/configuration changes to improve this situation. >> >> BTW... from the inception there was no or negligible delay. Several >> months later, I am seeing this on regular basis even hourly volume is >> not large. >> >> Oct 29 16:06:10 pmx1 postfix/smtp[7414]: 200AC43831: >> to=<u...@domain.com>, relay=none, delay=40, delays=0.01/0/40/0, >> dsn=4.4.1, status=deferred (connect to >> mail.domain.com[96.57.168.248]:25: Connection timed out) > > this is clearly a *network* problem on the server *or* the client > *or* somewhere between (routers, switches....)
