On Wed, Jan 31, 2018 at 05:01:41AM +0000, Voytek wrote: > # grep _limit main.cf
Please read http://www.postfix.org/DEBUG_README.html#mail and follow it. > smtpd_client_connection_rate_limit = 12 > smtpd_client_connection_count_limit = 5 Well, here is your problem. >From the documentation: | WARNING: The purpose of this feature is to limit abuse. It must not be | used to regulate legitimate mail traffic. > smtpd_soft_error_limit = 5 > smtpd_hard_error_limit = 10 Revert them to default, esp as the default is state dependent. Bastian -- Military secrets are the most fleeting of all. -- Spock, "The Enterprise Incident", stardate 5027.4
