Mail dropped before being added to SharePoint Email Enabled Libraries

[DD69]

I have a MOSS2k7 farm & I'm using Exch2k7 for mail transport. We've recently upgraded from 32bit to 64bit so i still have one 32 bit MOSS server with the SMTP functionality set up and working. I've been trying to move that service to one of my new 64bit servers but have an issue. For some reason, when i set everything up to point from my old 32bit SMTP server to my new 64bit SMTP server, the mail doesn't reach the libraries.

For example: I have an email enabled library using doclibrary1@test.com. The library is set up to create a top level folder based on the recipient and to keep the original mail and attachments. I email that library and can see it hit and leave the Drop folder on my SMTP server. GREAT! Uh, no wait. In checking the library, i see the folder created based on my email address but no original email and no attachment. If i change it to not sort by original sender and to not keep original email, seems like nothing happes other than the message hitting/leaving the drop folder. I've sent messages about 2MB to it and i can see the appropriate size of the message in the Drop folder. I've even tried creating a brand new library. Same results.

I'm at a loss

 

[DD69]

Yesterday i sent a test msg through my old server, copied the msg from the drop folder, sent a msg through my new server, copied the msg from the drop folder and then i ran windiff on the two files. In comparing the files i think the only real difference was how it was received. Does this help any?

Received: from exchange1.domain.com ([1.2.3.4]) by newserver.domain.com with Microsoft SMTPSVC (7.0.6002.18264);
Received: from exchange1.domain.com ([1.2.3.4]) by oldserver.domain.com over TLS secured channel with Microsoft SMTPSVC (6.0.3790.4675);