Seem to be having issues with receiving and sending e-mail on my laptop. I am running Thunderbird 45.6.0 on Windows 10 Home Version 1607. It just stopped receiving e-mails with the error message: Login to server xxxxxxx failed. Then I re-entered my password and another error message: Sending of password for user [email protected] did not succeed. Mail server xxxxxxxx responded: Authentication failed. I was initially still able to send out messages, but now even that does not work after I started tinkering with the server settings. I can send/receive e-mails on my iphone using the same password without any issues, so thinking it is not a server problem. Please help Thanks!