Hey Guys, Am having a really bizzare problem here causing us massive grief and i'm having a hard time trying to replicate/isolate the cause am hoping you might have a few ideas.
On our primary mail server here i'm noticing major (up to 1-2 minutes) delays on incoming SMTP connections at the end of the DATA phase. After the final period exim appears to be hanging a majorly long time before notifying the client that their message is accepted. The message is eventually accepted but the clients are timing out, which for our customers is resulting in messages being held in their outboxes and re-sent multiple times (MUA thinks it failed, however it just timed out before receiving the OK). This also seems to result in a stack of TCP connections to exim hung in FIN_WAIT. Initially I suspected it may have been Sophos introducing the delays, disabled it yesterday and the problem seemed to go away, however today it is happening again and i'm at a loss as to what is causing the delays. The machine isn't loaded in any way and has been running solidly for months. The logs reveal nothing, and what makes it so much harder is it's next to impossible to replicate in that some incoming sessions run fine, others don't and this isn't dependent on the content of the mail or anything - I can do 10 manual sessions telnetting to localhost and some will work fine, some with hang with exactly the same sequence of commands. If anyone can suggest any techniques that might help to diagnose this i'd be very appreciative. Thanks, Marcus -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
