Markus E.:
> Hello!
>
> I just noticed my servers replies with a 454 (instead of 554) when a bot
> checks for an open relay. Here's one exameple:
>
> Mar 10 08:53:46 mx1 postfix/smtpd[16747]: connect from
> xxx.fesersglobal.com[45.85.90.xxx]
> Mar 10 08:53:51 mx1 postfix/smtpd[16747]: NOQUEUE: reject: RCPT from
> xxx.fesersglobal.com[45.85.90.xxx]: 454 4.7.1 <[email protected]>: Relay
> access denied; from=<[email protected]> to=<[email protected]> proto=ESMTP
> helo=<WIN-CLJ1B0GQ6JP>
> Mar 10 08:53:52 mx1 postfix/smtpd[16747]: disconnect from
> xxx.fesersglobal.com[45.85.90.xxx] ehlo=1 mail=1 rcpt=0/1 rset=1 quit=1
> commands=4/5
>
smtpd_relay_restrictions, I presume?
Wietse
