This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Thunderbird wont connect to my .live.co.uk email address?

more options

Sending of password for user @live.co.uk did not succeed. Mail server pop3.live.com responded: Authentication failure: unknown user name or bad password. [Error="ProxyNotAuthenticated" AuthResult=0 Proxy=HE1PR03MB1177.eurprd03.prod.outlook.com:1995:SSL]

Sending of password for user @live.co.uk did not succeed. Mail server pop3.live.com responded: Authentication failure: unknown user name or bad password. [Error="ProxyNotAuthenticated" AuthResult=0 Proxy=HE1PR03MB1177.eurprd03.prod.outlook.com:1995:SSL]

Chosen solution

There's a thread here which explains what is going on: http://forums.mozillazine.org/viewtopic.php?f=39&t=3001787 I know it looks technical (tho I'm not a technical person!) but two points are being made: 1) If you want to use POP mail you now have to log in to outlook.com and 'enable' POP. (See the final post in the thread.) If you don't do that you will get the error message you have received. 2) The reason you have to do that is because Outlook (like many other mail providers) is making IMAP rather than POP the default. If, in the light of that, you now want to switch your account from POP to IMAP, follow the tutorial here: https://support.mozilla.org/en-US/kb/switch-pop-imap-account

Read this answer in context 👍 5

All Replies (1)

more options

Chosen Solution

There's a thread here which explains what is going on: http://forums.mozillazine.org/viewtopic.php?f=39&t=3001787 I know it looks technical (tho I'm not a technical person!) but two points are being made: 1) If you want to use POP mail you now have to log in to outlook.com and 'enable' POP. (See the final post in the thread.) If you don't do that you will get the error message you have received. 2) The reason you have to do that is because Outlook (like many other mail providers) is making IMAP rather than POP the default. If, in the light of that, you now want to switch your account from POP to IMAP, follow the tutorial here: https://support.mozilla.org/en-US/kb/switch-pop-imap-account