Hello,

I've stumbled across one of our older systems and noticed a minor problem in its mail delivery system.

Nov 20 07:13:55 n2rhps87 postfix/smtp[10528]: 5BB06440329: to=<[email protected]>, relay=mailrelay.cms1[10.254.254.18]:25, delay=300, delays=0.07/0/0.01/300, dsn=5.5.0, status=bounced (Protocol error: host mailrelay.cms1[10.254.254.18] said: **********************220 ******** 421 Exceeded allowable connection time, disconnecting. (in reply to end of DATA command))

I've tried to resolve it by adding

smtp_connection_cache_on_demand = no

to main.cf, but it didn't help. Did I turn the wrong knob? This problem occurs when there is a burst of mail activity, then pause (5 minutes is probably the limit) and then another mail tries to be delivered. This server only produces mail and sends it via smarthost. RHEL 5.6 64bit, postfix-2.3.3-2.1.el5_2.


--
Pavel Urban
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   Vegetables should not be allowed to operate electronic equipment.
          Computer Stupidities, http://rinkworks.com/stupid/
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