I'm trying to track down the source of occasional SMTP timeouts for inbound connections. The connection is accepted but the real SMTP greeting is never sent.
The timeouts correlate to these error in the logs:
On a very low volume server, It seems to occur maybe a dozen times a day. I don't see bursts of activity around these times that should cause that file to be locked for any extended period of time.
Any idea why this is happening and how to prevent it?
Thanks
EDIT: forgot to include version:
The timeouts correlate to these error in the logs:
Code:
2026-06-06T22:47:03.519916-04:00 pmg postfix/postscreen[22046]: fatal: btree:/var/lib/postfix/postscreen_cache: unable to get exclusive lock: Resource temporarily unavailable
2026-06-06T22:47:04.521023-04:00 pmg postfix/master[1183]: warning: process /usr/lib/postfix/sbin/postscreen pid 22046 exit status 1
2026-06-06T22:47:04.521119-04:00 pmg postfix/master[1183]: warning: /usr/lib/postfix/sbin/postscreen: bad command startup -- throttling
2026-06-07T07:37:03.535380-04:00 pmg postfix/postscreen[27544]: fatal: btree:/var/lib/postfix/postscreen_cache: unable to get exclusive lock: Resource temporarily unavailable
2026-06-07T07:37:04.536332-04:00 pmg postfix/master[1183]: warning: process /usr/lib/postfix/sbin/postscreen pid 27544 exit status 1
2026-06-07T07:37:04.536433-04:00 pmg postfix/master[1183]: warning: /usr/lib/postfix/sbin/postscreen: bad command startup -- throttlingOn a very low volume server, It seems to occur maybe a dozen times a day. I don't see bursts of activity around these times that should cause that file to be locked for any extended period of time.
Any idea why this is happening and how to prevent it?
Thanks
EDIT: forgot to include version:
Code:
pmg-api/9.0.7/d11aa4b692ae (running kernel: 7.0.6-2-pve)
Last edited: