On 2019-08-22 12:56, Wietse Venema wrote:
MRob:
I have group of user behind single WAN using mine Postfix submission
service. Sometimes they cann't connect but I dont know why. I thought
its cause that Postfix has default connection maximum from single IP
source, is this true?
What is the error message?
Wish I could have users to cooperate show me the error! :)
* What is error/fail message in logs which I could find to verify I
have
that problem?
$ grep -i 'too many' /var/log/maillog
Thank you kindly! It wasn't this problem, Iwill have to ask user for
better information!
Fix: update smtpd_client_event_limit_exceptions,
smtpd_client_connection_count_limit, or
smtpd_client_connection_rate_limit.
$ grep -i 'stress' /var/log/maillog
Fix: increase the SMTP daemon process limit (in master.cf, or
default_process_limit in main.cf), and do "postfix reload".
Wietse
