SME 6 beta is unable to send or receive e-mail, it just started happening after being online 380 days. It is setup behind a firewall with the required ports forwarded which I verified works by setting up an alternative mail server. The message I receive in webmail is "There was an error sending your message: unable to send data", the error in Mozilla using IMAP is "... that message exceeds the maximum message length." I upgraded to 6.0.1-01 but the problem still exists.
No one has any quota set and there is ample hard drive space. Has anyone seen this or have a solution? Searching the forums has not presented any solution.