I'd have to agree this is the problem. Can you do some logging to figure out what's the max size you can send successfully?

-derby

update: I would also suggest bcc'ing the large emails to an account you know doesn't have size limits (gmail, hotmail, a personal account).

In reply to Re^4: Sending a large mail with Mail::sendMail by derby
in thread Sending a large mail with Mail::sendMail by mrguy123

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