[pfx] Re: Strengthen email system security

Em 22/05/2024 19:33, Northwind via Postfix-users escreveu: Hello list, In the last two days, my mail system (small size) met attacks. mail.log shows a lot of this stuff: May 23 06:24:29 mx postfix/smtpd[2655149]: warning: unknown[194.169.175.17]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Re: Self hosting solution for Christmas

Postfixadmin in next version? Thanks again! -- _Engº Julio Cesar Covolato 0v0 /(_)\ F: 55-11-99175-9260 ^ ^ PSI INTERNET -- Em 24/12/2022 05:03, Andre Rodier escreveu: Hello everyone, Here my present for Chr

Re: Self hosting solution for Christmas

Thanks Santa!!! Good work! -- _Engº Julio Cesar Covolato 0v0 /(_)\ F: 55-11-99175-9260 ^ ^ PSI INTERNET -- Em 24/12/2022 05:03, Andre Rodier escreveu: Hello everyone, Here my present for Christmas: a new vers

Re: protecting internal email distribution lists

Em 24/08/2022 13:06, Jaroslaw Rafa escreveu: Dnia 24.08.2022 o godz. 19:03:37 Ivars Strazdiņš pisze: I tested and it did not work for local users, access is denied (sending not possible) only for external ones. Mail is sent to l...@domain.com regardless if local send

Re: protecting internal email distribution lists

Em 24/08/2022 10:08, Ivars Strazdins escreveu: Hello Postfix Experts, let’s say that domain.com is Postfix $mydomain. I know that it is possible to protect /etc/postfix/protected_destinations from external senders, as per https://www.postfix.org/RESTRICTION_CLASS_README.htm

warning: unknown[137.xxx.xxx.253]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Hi. I would like to know why these messages appear in the mail.log, I know that "UGFzc3dvcmQ6" is base64 encoded for "Password:". Is this some misconfigured internet mail server system (Windows)? Blocking these IPs with fail2ban is a good idea? Jun  5 23:25:08 saturn postfix/smtps/smtpd[11831]:

Re: Delivering some domain's email locally and some via relay transport

Em 11/06/2020 06:58, Andrew Beverley escreveu: Dear all, I have a domain, for which I would like to deliver some email locally (as a virtual domain) and some email via a relay (using a transport map). The differentiation is based on the recipient address. For example, I would like us...@example