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List:       postfix-users
Subject:    Re: Default connection limiting?
From:       MRob <mrobti () insiberia ! net>
Date:       2019-08-22 15:41:17
Message-ID: cca7ccf1c3a97e7f5d30f16cd3a2f39c () insiberia ! net
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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
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