suddenly I am asked for passwords on my two email accounts, and when I enter the passwords, which are correct as I've checked with my ISP...I am not able to access my email at all. Email programme was working fine about three hours ago, and now...well I am continually asked for passwords for my accounts, and then told they are incorrect? I've shut down Thunderbird after reentering passwords, have double checked settings, and had to change IMAP setting to mail. etc., as that is what my ISP has told me to put and have also changed it back to imap, but still cannot access my emails at all.

Please someone help me sort this out, it is doing my head in...and this isn't the first time Thunderbird had done this with password issues either///GRRRR