> On 02-13-2022 11:56 am, [email protected] wrote:
> Just to clarify, does this error mean they requested SASL login and postfix 
> told them it wasn't
> enabled?
> I am under the belief SASL logins are disabled on port 25. 
> (smtpd_sasl_auth_enable =
> no)
> Or does it mean postfix allowed them to provide login details and it failed 
> because of bad
> user/pass?
> I just want to verify its not enabled, because they repeatedly did this like 
> a dictionary brute force
> attempt.
> 
> 
> postfix/smtpd[1940626]: connect from unknown[5.34.207.103]
> postfix/smtpd[1940626]: warning: unknown[5.34.207.103]: SASL LOGIN 
> authentication failed:
> UGFzc3dvcmQ6
> postfix/smtpd[1940626]: disconnect from unknown[5.34.207.103] ehlo=1 auth=0/1 
> rset=1 quit=1
> commands=3/4


I am sorry, ignore this whole thread. 
My brain wasn't fully engaged, this log entry was for port 587 not on port 25.

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