I have thunderbird connected to my BT account. I now find I cannot send emails. States login to account BT mail failed, Then another message unable to authenticate outgoing server SMPT. Check password and verify authorisation method in account setting outgpoing server SMPT. Have done this and it seems ok. Has anyone else had this problem?
Solved! Go to Solution.
Are you presently a BT Broadband customer or are you paying for your email through a BT Premium email account?
If neither of the above your email account may have been downgraded to a BTMail Basic account which can not be used with an email client
See link
https://www.bt.com/help/email/bt-email-products
Yes, from time to time, it just wants me to re-enter all the login details, then it's OK again.
Go through all the T'bird settings to ensure they comply with the following link.