We migrated from Exchange 2003 on a Small Business Server to Exchange 2007 Service Pack 2 64bit on an Windows 2008 Standard Edition 64 bit server 2 weeks ago and ever since then I can't seem to get our Exchange 2007 public folders to receive emails from ANY outside of the domain address (works perfectly from within the domain).
I've checked the permissions for the folders and theirs no deny rules or anything. If I send an email from within the company to that email address it will reach it without issue.
I've checked the Message Delivery restrictions under the properties tab for each folder and it's set to receive messages from All Senders and to reject messages from No Senders.
This just happened since our migration from Small Business Server to Exchange 2007. Seeing as it's working internally the public folders are indeed mounted and working correctly. Any help would be greatly appreciated.