How are they doing
this.
Someone out their is
sending out spam and for a return address they were specifying an email address
and [EMAIL PROTECTED]. Then they used a
open mail relay server to send out the spam. When they send a email to a bad
email address the receiving mail server sends a non delivery report to our mail
server. Our quick solution to that was to drop the MX record for the
dbcorp.ab.ca domain. We could do this mainly because it has not been used for
several years now. The only reason we had it was for legacy support. Since we
dropped the MX record I figured it would not be possible for mail servers to
send us NDR. But now we are receiving NDR at our web server for the
dbcorp.ab.ca domain. I don't understand why a mail server would be sending
NDR to that IP address. Right now we have set up a MX record under dbcorp.ab.ca
that points to the web server of the company that is sending out the spam but I
still see the NDR coming to us on our web server. I assumed if there
is no MX record there could be no mail delivery be it a NDR or otherwise. How
are they managing to make email servers point to our web site for the
NDR
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