How to block originating relay?

[soulf2]

I am using the following to help keep the spam down and it has been working great on my own server.

FEATURE(`access_db', `hash -T<TMPF> -o /etc/access')dnl
FEATURE(`dnsbl', `sbl-xbl.spamhaus.org', `"571 ACCESS DENIED to <"$&f"> thru "$&{client_name}" by /spamhaus/ ;Please see

http://www.spamhaus.org/sbl/"')dnl

The problem is that I have my company e-mail address forwarded/relayed to my mail server and it doesn’t block any spam.

Is there a way I can apply the same blocking to messages that are relayed to me from my corporate mail server without blocking that mail server all together?

 

[RhythmAce]

I do a couple things that seem cut down on quite a bit of junk mail. First I list all the valid users in the virtusertable. The I create a catch-all for each domain I host. Here is a brief sample of what the table looks like:

joe@domain1.com joe
webmaster@domain1.com joe
fred@domain1.com fred@hotmail.com
@domain1.com error:nouser Sorry - No such user

# Do the same for domain2.com

When you are done, issue this command to build the database:

makemap hash /etc/mail/virtusertable.db < /etc/mail/virtusertable

The second thing I do is use spamassassin which came with my linux distro (RedHat).