W dniu 21.12.2021 o 16:22, Wietse Venema pisze: > natan: >> Dec 20 14:51:19 m4 postfix/postscreen[5883]: warning: cannot connect to >> service private/smtpd: Resource temporarily unavailable >> Dec 20 14:51:19 m4 postfix/postscreen[5883]: warning: cannot connect to >> service private/smtpd: Resource temporarily unavailable >> Dec 20 14:51:20 m4 postfix/postscreen[5883]: warning: cannot connect to >> service private/smtpd: Resource temporarily unavailable >> Dec 20 14:51:20 m4 postfix/postscreen[5883]: warning: cannot connect to >> service private/smtpd: Resource temporarily unavailable > There is a limit in your operating system kernel, or in your Postfix > configuration. > >> in main.cf: >> default_process_limit = 1200 --> beacause i have many incomming e-mail >> >> in master.cf >> smtp inet n - - - 1 postscreen >> smtpd pass - - - - - smtpd -o >> receive_override_options=no_address_mappings > postscreen tries to hand off each 'good' connection to an smtpd > process. Apparently, there are not enough of smtpd processes to > take those connections, and some kernel-internal queue is filling up > resulting in an EAGAIN kernel error code. > > Possible causes: > > 1) The default_process_limit of 1200 is too low. In that case a > higher default_process_limit would help. Hm I try up 20%
but: for local lmt port:10025 - 5 connection for incomming from amavis port: 10027- 132 connections smtpd - 60 connections ( ps -e|grep smtpd - 196 connections > > 2) Your kernel cannot support the default_process_limit of 1200. > In that case a higher default_process_limit would not help. Instead, > kernel configuration or more memory (or both) would help. 5486 ? Ss 6:05 /usr/lib/postfix/sbin/master cat /proc/5486/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max resident set unlimited unlimited bytes Max processes 257577 257577 processes Max open files 4096 4096 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 257577 257577 signals Max msgqueue size 819200 819200 bytes > > 3) Some non-Postfix "security" feature is getting in the way. > > In the implementation, postscreen makes a non-blocking connect() call > with a 1-second time limit, and immediately receives an EAGAIN > kernel error code (immediately, because postscreen logs the same > warning message multiple times per second). > > Wietse --
