Someone pointed out off list that Doubleclick domains appear in some of the SURBL lists, and that while they do appear in some spams, they also appear in a lot of hams.

Therefore should we whitelist Doubleclick domains?

Thanks to some good research tools, we have a list of some of them:

* 1: 0mm.com * 2: 2clk.net * 3: abacus-direct.com * 4: businesslink-2.net * 5: businesslink.net * 6: cr-mail.org * 7: dartmail.com * 8: dartmail.net * 9: dartmail3.net * 10: dclk.net * 11: destinationwww.com * 12: double-click.com * 13: doubleclick.com * 14: doubleclick.de * 15: doubleclick.net * 16: maildart.net * 17: messagemedia.com * 18: opt-inemail.com * 19: optin-email.com * 20: unitymail.net

Again, we know they appear in some spammy mailings. But do they appear in enough hammy messages to whitelist?

Comments?

Jeff C. -- "If it appears in hams, then don't list it."