Forum Notification email Domain

Discussion created by deleted-user-ATjHIWsdQYmT on Feb 10, 2010
Latest reply on Apr 29, 2010 by jbarry-esristaff
Does anybody know the domain name forum notifications are sent under?  I think our spam filter is blocking any notifications sent to let me know that a thread I have subscribed to has had activity.  I want to let our Network admin know which domain name to whitelist.