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I am trying to use Thunderbird 68.5.0 to access Gmail, on which I have enabled two factor authentication. I am able to access my Gmail account in the browser.

In Google accounts, I have generated an app password.

Following the advice at this link, I have set general.useragent.compatMode.firefox to true. javascript.enabled is already set to true, and cookies are already enabled.

Then in Thunderbird I click on the "hamburger" menu button and from there I do + New | Existing Mail Account... On the dialog that pops up I enter my name, and the email address of my gmail account. Following the advice on this page, I enter here the app password (not the normal password of my Gmail account). I click Continue.

Thunderbird automatically selects IMAP and detects the gmail servers. I click Done.

Thunderbird then displays another dialog asking for my Gmail email address, and another asking for my password - here I enter the normal password for my Gmail account. I then get the following error message:

Google couldn't verify that this account belongs to you

Any idea what I'm doing wrong? I have tried many other permutations on the above, no joy.

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    Are you adding this account as an IMAP/SMTP account or as a GMail account? You should use the IMAP route and manually configure it, and use the app specific password in IMAP/SMTP instead of using Google's authentication mechanism. (if you don't find a solution via the Google Authentication option)
    – Thomas Ward
    Feb 13, 2020 at 15:10
  • Many thanks for getting back to me. It automatically selects IMAP, I edited my post to clarify that. If I click the Manual Config button, it displays the hostname, port, SSL and Authentication (OAuth2), but there is no place to enter a password - The only option is to click Done and from there it displays the followup dialogs as described in my original message. Feb 13, 2020 at 15:45

1 Answer 1

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I got it working. I was using Authy for 2FA, the solution was to go in to Authy and set up 2FA for Google Accounts. After that when I repeated the above steps to access Gmail from Thunderbird, it asked me for the code, which Authy generated, I put that in and it worked.

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