If you are using Outlook Express as your e-mail software and are trying to send e-mail out using your mail server (mail.yourdomain.com), you might come across the following error message:

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'mail@yourdomain.com', Server: 'mail.yourdomain.com', Protocol: POP3, Port: 110, Secure(SSL): No, Error Number: 0x800CCC0F

This message is usually due to firewall software running your computer such as Norton Firewall or ZoneAlarm. Please disable this and try sending e-mail again - it should work!