Use real email addresses. If you use generic ones like hotmail, aol, msn, or anything the big mail messengers do not recognize it gets funneled to spam. When I send emails out I send them out with
admin@politicalbuddies.com even though that email does not exist. The last part with my site url tells google that it's not junk as my site is not flagged for spamming, and has a good record with google. I just add in the footer that any reply will not be answered and if they want to actually talk to us they'll need to get on the board. Hope this helps!