I have a BT Internet account and have had no problem sending and receiving email on my PC using Windows Mail (NOT WINDOWS LIVE MAIL) until 22 December. My settings were Outgoing SMTP 25 SSL not enabled. Incoming POP3 110 SSL not enabled. I spoke with BT who said change settings to Outgoing SMTP 465 SSL enabled and Incoming POP3 995 SSL enabled.

With original settings my error messages are.............

The message could not be sent. The authentication setting might not be correct for your outgoing e-mail [SMTP] server. For help solving this problem, go to Help, search for "Troubleshoot Windows Mail", and read the "I'm having problems sending e-mail" section. If you need help determining the proper server settings, please contact your e-mail service provider.

The rejected e-mail address was *** Email address is removed for privacy ***'. Subject 'Chat', Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: SMTP, Server Response: '530 authentication required - Your email could not be sent. To fix this you must make a simple change to your email client (known as SMTP authentication). For advice visit http://www.bt.com/smtp', Port: 25, Secure(SSL): No, Server Error: 530, Error Number: 0x800CCC78

and

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Subject 'Email', Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F

Message number 14333 could not be retrieved. Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: POP3, Server Response: '-ERR inactivity timeout', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800420CD

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

With the BT advised settings, the error messages change to

The message could not be sent. The authentication setting might not be correct for your outgoing e-mail [SMTP] server. For help solving this problem, go to Help, search for "Troubleshoot Windows Mail", and read the "I'm having problems sending e-mail" section. If you need help determining the proper server settings, please contact your e-mail service provider.

The rejected e-mail address was 'my email *** Email address is removed for privacy ***'. Subject 'XXXX', Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: SMTP, Server Response: '530 authentication required - Your email could not be sent. To fix this you must make a simple change to your email client (known as SMTP authentication). For advice visit http://www.bt.com/smtp', Port: 465, Secure(SSL): Yes, Server Error: 530, Error Number: 0x800CCC78

and

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Subject 'Email', Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: SMTP, Port: 465, Secure(SSL): Yes, Error Number: 0x800CCC0F

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'mail.btinternet.com', Server: 'mail.btinternet.com', Protocol: POP3, Port: 995, Secure(SSL): Yes, Error Number: 0x800CCC0F

Help would be appreciated! Thanks