When starting Thunderbird, the status line shows logging in to server but loops; no errors, Thunderbird is 'locked out' waiitng/spinning.

Does that also happen if you start TB in Troubleshoot mode?

A few things to try, even in Troubleshoot mode if you have to. Do one at a time and test:

R. click Inbox > Properties > click 'Repair folder' button, then R. click Inbox > Compact

Clear cache:

- press Ctrl-Shift-Delete

- set 'Time range...' to 'Everything'

- untick all items except 'Cache'

- clear, then restart TB

Clear Startup cache:

- TB menu > Help > Troubleshooting information > click 'Clear startup cache' button on the right

Rename a program file:

- TB menu > Help > Troubleshooting Information

- under the Application Basics section next to Profile Folder, click 'Open Folder'

- close TB

- rename addonStartup.json.lz4 to addonStartup.json.lzx

- restart TB

Change proxy settings:

- TB menu > search for proxy > click 'Settings' button > try the other settings

Ed: Thanks for your reply.

The actual message (and as far as TB gets) is:

<user e-mail: host contacted, sending login information"' < em> </user>

followed by a small-ish blue spinning circle.

Per your suggestions, TB did come up in Troubleshoot mode (via SHIFT key method), but then went into the discussed state (above message, spinning circle) so I was not able to try anything else.

This (to me) sounds like 'we' need a way to get TB in control, bypassing the login sequence; it would appear Troubleshoot mode does not allow that.

My guess is some file, related to the login process, is corrupted and needs to be re-created/replaced.

Again, the connection to the server is fine (Webmail) works so it's (to me) definitely a TB issue. Also again, I see the normal INBOX page and local folders list, but logging in never completes.

Any further suggestions, or help much appreciated.

Ed: My previous reply was 'edited'; the TB message line is:

user e-mail id: Host contacted; sending login information

There's no way to prevent TB from trying to log in when opening. I agree there might be some corruption, so try a new profile - https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-thunderbird-profiles.

Ed: Wow! More than I EVER wanted to know about profiles and TB internals! What I've done: - used Profile Manager to create a new profile, cleverly called 'Al' - TB has successfully re-started, connected and downloaded ALL the server messages using the 'Al' profile. So far, so good. However, switching back to the original 'default' profile has the same issue - looping trying to log into the server.

So - how do I proceed? luckily, I have a TB profile backup from a week or so ago when TB was logging in as expected. If I wanted to 'reload' that profile, would the 'import' function work while profile Al is being used? Then, presuming that works, would I use Profile Manger to switch to the (old) 'default' profile? What happens to the new messages (from last week or so, when this issue started)? Will they be 'picked up' as NEW from the server?

I read about COPYing information from one profile to another "Recovering information from an old profile" but that was specific to FireFox! Can I (and if so how) selectively copy from an old TB profile to another profile?

I'm confused as to how to proceed; I want the old profile settings, but NOT the login problem, whatever it was AND I want it to JUST pick up server mail from the date the problem started. Any further comments, suggestions or recommendations much appreciated - as is your help until now! Thanks.

Ed: So - how do I proceed? luckily, I have a TB profile backup from a week or so ago when TB was logging in as expected. Close TB > copy the contents of the profile backup folder > paste it into the not-working profile folder > restart TB. If that works, you can just delete the AI profile.

Ed: Sorry the delay.. life getting in the way of being productive!? Status: I finally have what I think is the default profile from the backup. In the User/AppData/Roming/Thunderbird/Profiles directory is just ONE file per profile. I see: 2rdt445x.default gpsqti12.Al (Obviously (to me) is the 'Al' profile I created is the 2nd one.) However... That .default file is 5.67GB, pretty well the size of the entire messages, settings and profile backup! I was expecting to see a very small 'profile', copy that and re-start TB. Per your last reply, are you suggesting I copy the entire 5.67GB from the backup? Won't that replace EVERYTHING? (ie. messages, settings)

I was also originally planning to rename the 'not working' profile with .OLD but not sure I can afford the extra 5.67GB on the Win 10 system. Plan B will be to move the bad one to a memory stick, delete, then copy in the backup version with the same name to the Profiles directory.

I'm just very nervous about making thing worse (not sure how they could be?!) and wanted reassurance from you that my thinking and plan will work.

Any further reply appreciated - again!

"Per your last reply, are you suggesting I copy the entire 5.67GB from the backup? Won't that replace EVERYTHING? (ie. messages, settings)"

Yes and yes. If you don't want old Inbox/subfolder emails, delete them from the server via the web.

"I want the old profile settings, but NOT the login problem, whatever it was AND I want it to JUST pick up server mail from the date the problem started."

You can't restore settings only. This is the first step just to see if the login problem is solved. If it is, and you don't want any emails that you stored in Local Folders, delete them. If the login problem isn't solved, you'll have to use the new profile you created or create another new one.

Thanks for your previous comments.

Status: - I renamed (supposedly bad) profile, appending ".BAD" - the backed up (supposedly good) profile was copied to the TB Profiles foder I could see it in the Profile Manger; all looked good. However, upon TB startup, the login issue did not happen, BUT no local folders, etc. were seen - as if it were a new account; no 'activity' trying to login to server, download e-mails, etc. - just a very plain page.

I think/hope I've done all the right things, but using the backed up profile has 'corrected' the login issue (no spinning), but nothing else (accounts, local folders, etc.) is there!

Is there any value, once in this latest version of TB, to try an IMPORT from the backed up .ZIP file or would that (probably?) re-introduce the login spinning problem?

As always, anything further is appreciated.

You didn't do what I suggested above: Close TB > copy the contents of the profile backup folder > paste it into the not-working profile folder > restart TB.

Ed:

I had TB closed, the copied the backed up profile folder. Was I supposed to copy each file of the backed up one into the not working one (rather than renaming), then restart TB? I didn't try it (anxiety of making things worse), but won't there be duplicates? If so, do I REPLACE the not working versions? If so, why isn't that the same as renaming the entire folder and using the backed up one?

Sorry for being so dense, but I must be missing something and am trying to NOT destroy anything (that's why I just renamed the not working one).

Further clarification & comments much appreciated.

Ed: Was I supposed to copy each file of the backed up one into the not working one (rather than renaming), then restart TB?

Yes. Rename bad profile to the original name first. If it works, remove gpsqti12.Al.

See entry from 6/24/26 7:18AM above. I did the copy of many files to the 'bad' profile, did TB restart and got the same result: no problem logging in, but no local folders, no INBOX, no Accounts (that I could see), etc.

Can/should the many Profile files be done 'piece meal'?

I certainly appreciate your patience and help thus far, and the login issue does not happen, but now there is effectively NOTHING in TB.

What else, if anything, can you suggest to further determine where this 'new' issue is? (missing folders, messages, etc.)

Thanks.

Try the same procedure, copying the backup files into the gpsqti12.Al profile.