Mailinglist Archive: opensuse (3964 mails)

[Neil White <whiteyn@xxxxxxxxx>]

Hi all,
  I have got postfix running on SuSE 9.1 but have some problems.
It runs as a backup MX for a sendmail server running on Redhat 9.

I am having a spam related problem, but I dont know where to begin...
Whenever I enable postfix so that it is accepting external
connections, spam levels
rise.
Where for example the backup MX runs on a host called mail.my.net
I am getting spam in the form of subject@xxxxxxxxxxxx

What amazes me is that NOWHERE (to my knowlege) is the hostname
mail.my.net listed on the net - the solve purpose of this host is (at
present) backup MX.

So my question is, how are spammers sending mail to domains for which
this is backup MX and making the senders address appear to have come
directly from the mail host ?

Confused !

Whitey.