tobi:
[ Charset ISO-8859-1 unsupported, converting... ]
> On 25.04.2012 13:13, Wietse Venema wrote:
> > tobi:
> >> Hi list
> >>
> >> I have disabled SMTP-Auth on my port 25. so this port is only uses to
> >> receive emails for my domains but no relaying is possible. Now I have
> >> bots that try to auth on port 25 by issue
> >>
> >> Out: 250 DSN
> >> In: AUTH LOGIN
> >> Out: 503 5.5.1 Error: authentication not enabled
> >>
> >> the problem is that I cannot find a unique line for this in the logs.
> > Postfix does not log invalid commands. That would allow a
> > denial-of-service on the maillog file.
> >
> > Wietse
> imho it's not an "invalid" command but a disabled one ;-) I agree
> invalid commands should not be logged, but disabled commands?
That is the same thing. No matter how many times the bot tries, the
command will always fail. It does not matter if the command is not
implemented, or if the command is implemented but disabled. Logging
every command is a great way to spam the logfile with random junk.
Wietse
