Yes - that's a favorite trick of spammers to hit the backup server. If
you want you can add a third (fake) backup server:
tarbaby.junkemailfilter.com
It returns 451 on everything and gets rid of some of that spam (spammers
don't retry) and I get some training data for my black lists.
On 09/22/17 09:19, Davide Marchi wrote:
Hi friends,
On Debian Jessie, Postfix 2.11.3 and Spamassassin 3.4.0-6, I've just
setup an MX email backup server and now I realize that new spam come
from the MX backup server..
Is there any way to tell to reject any mail coming to the MX backup
server, if the primary server is up?
And again, many spam email came from a mine fake and nonexistent
"alias", for example:
on my server I guest i...@foo.org, and its alias: ali...@foo.org and
ali...@foo.org, and stop. The spam come from ali...@foo.org, that
doesn't exist, how I could reject and prevent to delivery from these
address, without compromise the backup server?
Many many thanks!
Davide
Italy
--
Marc Perkel - Sales/Support
supp...@junkemailfilter.com
http://www.junkemailfilter.com
Junk Email Filter dot com
415-992-3400
