Anti Spoofing Ruleset

Kevin Miller Kevin_Miller at
Wed Apr 18 16:03:27 IST 2007

> Basically all i want to say is if the mail is from anyone at ourdomain 
> it has got to originate from our network or networks. Will RDJ do this
for me ?
Your best bet is to do that at the MTA level, not in MailScanner.
Publish SPF records in your DNS defining which servers are authoritative
to send your mail out.  If you're running sendmail, look into the
smf-spf milter.  If you're running Postfix or another MTA, someone else
can tell you how to integrate SPF with it, as I don't have any
experience with them...

Kevin Miller                Registered Linux User No: 307357
CBJ MIS Dept.               Network Systems Admin., Mail Admin.
155 South Seward Street     ph: (907) 586-0242
Juneau, Alaska 99801        fax: (907 586-4500


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