On 4/16/2020 6:25 AM, natan maciej milaszewski wrote:
Hi
System debian 9 and postfix 3.1.14-0+deb9u1
This is only MX server.
In external server (zabbix) i add a trigger to send e-mail to my MX (1
e-mail per min)
and add zabbix (86.xxx.xxx.xxx) to mynetworks in my MX server
Al works fine but sometimes i get in log:
Apr 16 12:38:21 thebe4 postfix/smtpd[17093]: connect from
zabbix-ext.domain.ltd[86.xxx.xxx.xxx]
Apr 16 12:38:21 thebe4 postfix/smtpd[17093]: Anonymous TLS connection
established from zabbix-ext.domain.ltd[86.xxx.xxx.xxx]: TLSv1.2 with
cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)
Apr 16 12:38:21 thebe4 postfix/smtpd[17093]: too many errors after EHLO
from zabbix-ext.domain.ltd[86.xxx.xxx.xxx]
Apr 16 12:38:21 thebe4 postfix/smtpd[17093]: disconnect from
zabbix-ext.domain.ltd[86.xxx.xxx.xxx] ehlo=2 starttls=1 noop=1 commands=4
smtpd_hard_error_limit = ${stress?{1}:{20}}
Your system is operating in stress mode because all your postfix
processes are busy, which was probably noted elsewhere in the log.
When postfix is under stress, it tries to disconnect clients that
are wasting time in order receive as much mail as possible.
This client sent a noop command for some reason, which counts as an
error (postfix doesn't let clients send junk commands endlessly),
and was disconnected.
If you have sufficient resources (cpu, RAM, disk iops, bandwidth,
etc.) consider increasing the postfix process limit.
http://www.postfix.org/TUNING_README.html#proc_limit
-- Noel Jones
