Messages with attachments greater than 6MB (exact size is uncertain) do not get delivered locally. They appear in the message tracking center as follows:
SMTP: Message Submitted to Advanced Queuing
SMTP: Started Meddage Submission to Advanced Queue
SMTP: Message Submitted to Categorizer
SMTP: Message Categorized and Queued for Routing
SMTP: Non-Delivered Report (NDR) Generated
I have tested on two of our accounts (one being administrator). Settings in AD are to follow Exchange Defaults, which are set at 10240KB.
The weird thing is that not only does the recipient not know that a message was attempted to be delivered, but the sender never receives an NDR (I have tried sending messages from 3 domains). Any ideas?
Exchange V 6.5 Build 7638.2:SP2 on MS Server 2003 R2 Standard Ed. SP2