Hi!
Many articles about this error are available at Microsoft site:
OL: Error 0x800ccc0d or 0x800ccc0f When Receiving and Sending E-Mail
KB: Outlook 2002
OL2002: "Error 0x800ccc0f: Connection to the Server Was Interrupted" Error
Message When You Try to Send or Receive an E-Mail Message
KB: Outlook 2002
OL2002: Cannot Send Outgoing Mail
KB: Outlook 2002
XCON: POP3 Clients That Are Connected Over RAS May Disconnect After 10
Minutes in a Front-End and Back-End Server Environment
KB: Exchange 2000
Error Message: Your Server Has Unexpectedly Terminated the Connection
KB: Exchange 2000
XIMS: Troubleshooting POP3 and IMAP 13002 Error Messages with SSL on
Exchange Server
KB: Exchange
"Your Server Has Unexpectedly Terminated the Connection" Error Message
When You Send an SMTP-Based E-mail Message
KB: Windows 2000
OL2002: You Repeatedly Receive a Prompt for Credentials When You Log On to
the E-mail Server
KB: Outlook 2002
OL2002: Unable to Send Mail By Using Yahoo After Upgrading to Outlook 2002
KB: Outlook 2002
OL: "Server Has Unexpectedly Terminated the Connection" Error Message If
You Start Outlook or Outlook Express
KB: Outlook 2000
OLEXP: You Cannot Send a Message with Graphic Attachments
KB: Outlook Express
OLEXP: Outlook Express Error Codes
KB: Outlook Express
Alexander Gorlach,
MAPILab Ltd. -- Must have Outlook add-ons
http://www.mapilab.com/