Thunderbird - The incoming mail server already exists Solved

Question

Hello, I wanted to add a Gmail address to Mozilla Thunderbird. So I went through the standard process of adding an account. Once I reached the step for the IMAP and SMTP settings, I entered the parameters correctly. The verification of the password and username was going in circles. So I clicked on Cancel to finish. A little later, I did some research online to figure out what the problem might be. I understood that I needed to change some security settings for my Gmail account directly on the website. From there, I restarted Mozilla Thunderbird and started the Gmail account addition again. But when I clicked on finish, it displayed "the incoming mail server already exists." So I checked in "Tools" > "Account Settings," and the Gmail account in question does not appear. I also looked in "Outgoing Server (SMTP)," and there was indeed a line for Gmail with the email address in question. But after deleting that line, the problem is still present. Could you please tell me how I can start from scratch to correctly add this account all the way through? I am using the latest version of Mozilla Thunderbird. Thank you.

AdalineBowman · Accepted Answer

Thank you for your help.  Here is the solution I was given on another forum that works perfectly!  Try this: close Thunderbird. in the search bar, type %APPDATA% the explorer should open to this directory then go to Roaming>Thunderbird>profiles>XXXXXXX.default (XXXXXX corresponds to what appears as your profile) then go to >ImapMail there, you should have imap.gmail.com or something like that. rename it to imap.gmail.com.old and restart Thunderbird.

SerBal22 · Answer

Hello AdalineBowman,  Go to Tools / Account Settings or select the account on the left and click on "View settings for this account"  When the account is selected, scroll down to "Account management" and choose "Delete account" to remove the account.  To set up a Gmail account in Thunderbird, you first need to request an app password from Gmail: https://support.google.com/mail/answer/185833?hl=fr  It is the password generated by Gmail that you will need to provide when setting up the account in Thunderbird.  To set up the account, in Account Settings, choose "Add a mail account"

ginto5 · Answer

Hello,   wobbly situation where certain parameters have been taken but the task was interrupted due to your actions.   The only solution: completely uninstall Thunderbird, software and especially files!  Then reinstall it by specifying the parameters for all the accounts to be supported.  This doesn’t take much time and allows for a clean installation.

AdalineBowman · Answer

I understand, the thing I forgot to mention is that I have 10 other email accounts already set up in Thunderbird. So if you know of another solution that is less "drastic," I'm all ears. ^^

SerBal22 · Answer

AdalineBowman  You will edit the prefs.js file as indicated in this thread:  https://forums.mozfr.org/viewtopic.php?t=89604

Thunderbird - The incoming mail server already exists

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