When you try to send or receive email messages, you may see an error message similar to one of the following:
The server unexpectedly terminated the connection. There may be a problem with the server, a network problem, or it may have been idle for a long time. Account. account name, Server: ‘server name’, Protocol: POP3, Server response: ‘+ OK’, Port: 110, Secure (SSL): N0, Error number: 0x800ccc0f
Connection could not be established as the target computer has actively denied that connection.
Server Not Found. (Account: account number, POPServer: ‘mail’, Error number: 0x800ccc0d)
Task ‘Server Name – Send and Receive’ reported an error (0x800ccc0f): ‘The connection to the server has been interrupted. If this problem persists, contact your server administrator or your Internet Service Provider (ISP). The server replied:? K ‘
Task’ SMTP server name – Send and Receive ‘reported an error (0x80042109):’ Outlook cannot connect to the outgoing mail (SMTP) server. If this message continues to appear, contact your server administrator or your Internet Service Provider (ISP). ‘
These error messages can occur if Microsoft Outlook or Microsoft Outlook Express cannot establish a connection to the mail server. These error messages are usually due to one of the following causes:
A. Incorrect account configuration in the mail client, such as in Outlook.
B. Configuration error in personal security software, such as firewalls or other filters
C. Incorrect modem or incorrect modem configuration
D. Maximum Transmission Unit (MTU) size
E. Outlook Express has been removed from the computer or the installation is damaged or corrupt
F. The Outlook user profile is damaged
G. An email message on the POP3 server is damaged or corrupt
H. Antivirus software configuration error.
Solution of error 0x800CCC0F
There are several possible solutions when this error message occurs:
- Verify that your Outlook or Outlook Express mail client settings are correct. You can even try deleting the account (s) you have set up and re-creating it.
- Verify that there is no local firewall that is preventing the connection to the server or ports 25 and 110. Or a local antivirus software or security software that is preventing or modifying the connection to the server. Or a proxy server or in any case an intermediate local server through which the connection to the server is being attempted. If there are, then please verify that the permissions and/or the IP or the outgoing SMTP mail server are enabled and configured accordingly.
- Corrupt e-mail messages in the mail inbox (Inbox) on the server: Sometimes it can happen that Outlook interrupts the connection when trying to download a badly formed, corrupted message, without a subject or without a message body. To fix it, go to Webmail, search the message list for the message that is causing the problem (usually the first or last, or the one you consider suspicious), and delete it.
- Consult and try the solutions suggested by Microsoft in their frequently asked questions base, click here .
- Check and try the solutions suggested by the security product you have installed on your pc.
- Try updating both your antivirus software and your Outlook. If you don’t know how to do it, ask a technician to do it for you.
- If your Outlook installation is corrupt or damaged, follow the instructions Microsoft suggests to make a backup. This way you could try to reinstall Outlook on your computer to fix mail server connection errors.