Q: Sendmail -- working around overly long greet pauses
Ed Greshko
Ed.Greshko at greshko.com
Tue Feb 20 20:09:59 UTC 2007
Philip Prindeville wrote:
> I'm trying to deliver email to some sites that seem to have
> obnoxiously long greet pause configured (yes, it's a
> Chinese site, and yes, it's their contact address for reporting
> abuse... guess they aren't about to make it easy to do):
>
> # date ; sendmail -q -v ; date
> Tue Feb 20 12:41:19 MST 2007
>
> Running /var/spool/mqueue/l1J1BZTd015129 (sequence 1 of 4)
> <anti-spam at ns.chinanet.cn.net>... Connecting to ns.chinanet.cn.net. via esmtp...<anti-spam at ns.chinanet.cn.net>... Deferred: Connection timed out with ns.chinanet.cn.net.
>
> Running /var/spool/mqueue/l1HKVCiu004463 (sequence 2 of 4)
> <anti-spam at ns.chinanet.cn.net>... Deferred: Connection timed out with ns.chinanet.cn.net.
>
> Running /var/spool/mqueue/l1HKWqcD004481 (sequence 3 of 4)
> <anti-spam at ns.chinanet.cn.net>... Deferred: Connection timed out with ns.chinanet.cn.net.
>
> Running /var/spool/mqueue/l1GKJkvD011374 (sequence 4 of 4)
> <anti-spam at ns.chinanet.cn.net>... Deferred: Connection timed out with ns.chinanet.cn.net.
> Tue Feb 20 12:44:29 MST 2007
> #
>
>
> I've tried bumping the connect timeout:
>
> define(`confTO_CONNECT', `5m')dnl
>
> (which results in "O Timeout.connect=5m")... as well as
> running sendmail as:
>
> sendmail -q -v -O Timeout.connect=5m -O Timeout.initial=5m
>
> but this doesn't seem to make any difference. It looks like
> the kernel's internal maximum timeout on a connect() is forcing
> a shorter interval.
>
> Anyone know what the workaround for this is? Do I need to force
> the kernel's TCP connect() timeout to something larger?
Before you try fixing anything please try....
telnet ns.chinanet.cn.net 25
It never answers the call. At least not from Taiwan.
--
"May your future be limited only by your dreams."
-- Christa McAuliffe
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