On Wed, 16 Aug 2006 09:07:28 -0700 Tom Collins <[EMAIL PROTECTED]> wrote:
> > I've noticed some spam sending hosts, which use e.g. localhost/ > > 127.0.0.1 > > as their sender MX. When my mailserver tries to verify the sending > > account via bounce check (connecting to 127.0.0.1), the rcpt to: > > check is ok, because chkuser accepts "unknown" rcpt to's from > > localhost. Is there a settings to get rid of that? > > Better would be a patch to qmail-smtpd that only accepted localhost > and 127.0.0.1 as the HELO name on connections from 127.0.0.1. I > don't know enough about chkuser to answer your original question. This would be one possibility but in this case the mail is already in the local queue - what we try to prevent. I think an extended chkuser patch is the better way. While chkuser already checks for an existing MX-record it could easily test the received A-Record against 127.0.0.0/8, RFC1918 or in case of a fqdn is it resolveable at all. regards, Lars Uhlmann
