Sorry about the top posting, but I'm on my phone. Is this supposed to be 2 and 3 also rather than 20 and 30?
in master.cf submission and smtps -o smtpd_soft_error=20 -o smtpd_hard_error=30 Original Message From: Benny Pedersen Sent: Sunday, February 21, 2016 4:13 AM To: postfix-users@postfix.org Subject: Re: SV: Security: How to limit authentication attempts? On 2016-02-21 13:00, Kiss Gábor wrote: >> > My colleagues need authenticated channel to submit mails when traveling. >> > So disabling sasl is not an option. >> read again i just say disalbe it on port 25 >> and convense users to use submission port 587, or 465 as users se fits > Can you guarantee that hotel firewalls allows to reach my port 587? :-> if thay block port 25 then use port 26 :=) but stop sasl auth on port 25, in case it breaks anything for users thay can still send postmaster a email, but not relay >>> The problem is already solved by Allen Coates. :-) >> what problem ? > "how to configure smtpd to close connection after 3 authentication > error"? > http://article.gmane.org/gmane.mail.postfix.user/254364 change _error smtpd settings in main.cf smtpd_soft_error = 2 smtpd_hard_error = 3 in master.cf submission and smtps -o smtpd_soft_error=20 -o smtpd_hard_error=30 but the master.cf does not matter, just a how to learn more postfix untested here with the master.cf, so if it works be happy
