If you want any kind of protection against spammers spoofing your domains email address, you should set up a SPF record.
There is an online wizard here:
http://www.openspf.org/wizard.html
Or an IRC channel for direct help: #spf on irc.perl.org
They also have mailing lists... but NO forums!! So if you do contact them, suggest they move into the 21st century and get themselves some forums