Hi all.

I'm new to fail2ban, and I need advice.

Here I have Postfix+SASL in Linux, users under /home. Quite vanilla.
Postfix uses several reject_rbl_client rules.

Here is a sample of the error messages I have.

***********
De:     Mail Delivery System <mailer-dae...@partagas.ettpartagas.co.
cu>
Para:   Postmaster <postmas...@ettpartagas.co.cu>
Asunto: Postfix SMTP server: errors from unknown[185.234.217.38]
Fecha:  Tue, 29 May 2018 14:13:00 -0400 (CDT)

Transcript of session follows.

 Out: 220 partagas.ettpartagas.co.cu ESMTP Partagas
 In:  EHLO 190.6.79.98
 Out: 250-partagas.ettpartagas.co.cu
 Out: 250-PIPELINING
 Out: 250-SIZE 15240000
 Out: 250-ETRN
 Out: 250-STARTTLS
 Out: 250-ENHANCEDSTATUSCODES
 Out: 250-8BITMIME
 Out: 250 DSN
 In:  AUTH LOGIN
 Out: 503 5.5.1 Error: authentication not enabled

Session aborted, reason: lost connection

For other details, see the local mail logfile
***********************

When I search for 503 5.5.1  in the log file /var/mail/mail.log,
nothing is found. In fact, there is no such a string to be found in the
logs under /var/log.

Where else should I search?

TIA,

Fumero
-- 
M.Sc. Alberto García Fumero
Usuario Linux 97 138, registrado 10/12/1998
http://interese.cubava.cu
No son las horas que pones en tu trabajo lo que cuenta, sino el trabajo
que pones en esas horas.





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