deoren:
> My question is very similar to Richard Laysell's question:
>
> On 4/7/2014 8:42 AM, Richard Laysell wrote:
> >
> > Hello all,
> >
> > What is the best way of dealing with pests like this?
> >
> > Apr 7 12:52:40 polyphemus postfix/smtpd[24765]: lost connection after
> > AUTH from unknown[78.188.45.153]
> > Apr 7 12:52:41 polyphemus postfix/smtpd[9398]: lost connection after
> > AUTH from unknown[78.188.45.153]
fail2ban or equivalent.
> If I enable the options for 'notify_classes' then I'll get a Postmaster
> email which contains the server response to the client:
>
> 503 5.5.1 Error: authentication not enabled
So, why do you worry about this, given that AUTH is not enabled?
> Can I enable logging that message for the client, or maybe just the '503
> 5.5.1' portion of it?
No. Logging bad commands is unsafe - the volume of logging can
easily exceed the network bandwidth. Adding a logging option for
individual Postfix responses would be a lot of work for little
benefit.
Wietse
