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Getting authentication failure when using Mozilla Thunderbird. 0 Recommended Answers 194 Replies 248 Upvotes
Last edited 5/31/19
Since a power failure on Monday, I am not able to send or receive email using Mozilla Thunderbird to download from a gmail account. I was asked to validate credentials when I first tried - I entered the correct password for the gmail account but login failed. I now get "Authentication failure while connecting to server imap.gmail.com" whenever I try to do something. I have two other email accounts which are still functioning in Thunderbird - one is a gmail. I know that the password I am using is correct as I can log directly into the gmail account to see my messages. I changed the Server setting to "Normal Password" (from OAuth2) to try to reenter the password but the login still fails. If I need to remove and re-add the problem email account, how do I do that and will I lose all the emails that are sitting in Thunderbird right now?
I am using a Microsoft Surface Pro 4 and Mozilla Thunderbird. The server is set to imap.gmail.com on port 993.
Thank you for any help - I am stumped!
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