When I send/receive I get a message saying an unknown error has occurred in Entourage and the mail cannot be sent. The error code 4363 is given. I checked my internet connection and closed and restarted Entourage with no change in result.
The message could not be sent. An unknown error (4362) occurred.
If this occurs when sending a message with attachments, open the draft message window, and remove the attachments. Re-attach the files, and try sending again. Make sure the file being sent is saved and closed.