I have a customer who's running a SBS-server with exchange 2003.
They have several Apple machines using Entourage and for while now they have had problems sending email from the entourage clients.
They get an error message saying:
"HTTP error. The post data is too large.
Mail could not be sent. The message has been moved to your drafts folder.
If they use owa it works fine. And the people running outlook have no such error.
I can't seem to find what's causing this error.