Re: [cobalt-security] Newbie at wits end with spammers through server

["Kevin D" <kdlists@xxxxxxxxxxxxxxx>]

From: "Michael Stauber" <cobalt@xxxxxxxxxxxxxx>

> > > c) Sender's domain name has an MX entry which points to the machine
where
> > > sendmail is running.
> >
> > This is not the case either. Same reasons as a).
>
> This is your opinion, but you don't know for sure, right? Try it out and
> you'll see.

Sender's domain name was www.mydomain.com. My server is the web host / email
host for this domain, so naturally it has an MX which points back to my
server. However, when the user tried to relay mail through my server, he
could not until I entered the sender's IP into the relaying table.

Is this scenario a correct test for the bug that you described? Did you have
to make changes to your sendmail.cf to prevent this? I want to make sure my
raq is relay-proof!

Thanks,
Kevin