We have a SBS 2008 server with Exchange 2007, with about 45 mailboxes. We suscribe to Spam Soap which is MX Logic technology to filter our mail for spam. One of our customers is trying to send one of our employees an 8mb pdf file, the message gets kicked back and the user gets an undileverable error. To test I sent an 8mb pdf from an external address and more or less got the same error he did. I checked the Spam Soap Console and there are no restrictions set for the pdf file type or size and I added the senders domain to the global accept list. In Exchange I increased the send and receive size for the employees mailbox. Below is the message I get. Any ideas if this is an Exchange issue or is it the Spam service?
message cannot be delivered to the following recipients:
Recipient address: email@example.com
Reason: SMTP transmission failure has occurred
Diagnostic code: smtp;552 Backend Replied [311e26b4.0.1174879.00-378.2047162.p02c11m113.mxlogic.net]: 5.3.4 Message size exceeds fixed maximu
Remote system: dns;cablelot.com.inbound15.mxlogic.net (TCP|184.108.40.206|64502|220.127.116.11|25)