Can't send mail
 

I have a client the wants to get his mail from an IMAP server.

Receiving mail is OK

We can't send mail.

error message is below:

http://service1.symantec.com/SUPPORT...01060516275506

-- "The TCP/IP connection was unexpectedly terminated by the server.
(Account: account name, POP3 Server: server name Error
Number:0x800ccc0f"


I have done everything the that can find on the internet.

He is running NIS 2004. Support ended 12/1/2005.

I can and receive mail via a pop account but witj NIS, we have to turn
off security.

Any suggestions?

thanks