This is all on MacOS Monterey, FYI.

I set up a new profile, re-entered all my accounts... and I'm seeing more indication of a problem. One of my Gmail accounts shows two Drafts folders (one is empty) -- but that is not present on the account online, or on my iPhone (Mail.app).

TB 115 won't allow me to delete the duplicate Drafts folder, either.

Another anomaly, I search for a sender (Quick Search) and within that list, when I click on Order Received (sorting) it doesn't work in that view, but it does in others.

At this point, would it be wise to downgrade Thunderbird to prior 115?

Currently for everyone using 102* all Thunderbird controlled updates are still updating to another 102* eg: 102.13.1 updated to 102.14.0 - I have just allowed this update.

Is there a particular reason you chose to install Thunderbird 115*?

When you installed 115*, did you do it as a separate installation and use a new profile? OR did you download and install over 102* so it auto used the original profile?

re : shows two Drafts folders (one is empty) -- but that is not present on the account online, won't allow me to delete the duplicate Drafts folder, either.

You cannot delete a folder that does not exist on server, but you can remove it manually from the mail account in profile folders - but you have to exit Thunderbird before you delete it. Help > TRoubleshooting Information Under 'Application Basics' - half way - Profile folders - click on Open Finder It opens a new window showing contents of profile name fodler Exit Thunderbird now - this is important

Click on 'ImapMail' folder to open and see contents As you have several imap gmail accounts they will be called imap.gmail.com and additional ones will have a number appended - imap.gmail-1.com

Click on the imap mail account name folder eg: imap.gmail.com and look for 'Drafts' and 'Drafts.msf' - if it has a zero size then this is the duplicate and it's empty - delete them. If you see '[Gmail].sbd' folder then it will contain all the files that represent folders. One of them should be 'Drafts' and 'Drafts.msf' and this one should have a size as it contains draft email. This is the one you need.

Thank you for taking the time to respond, I appreciate it.

A fair question, why did I installed TB 115. I thought it was a new official release (it is?) and I did in fact update my existing 102 installation; well, on MacOS, TB installed separately, but I kept the same Profiles directory content and that may be an issue.

After toiling with this, I decided to "start over" and installed TB 102.14.0 (MacOS) and re-set everything up. I am missing my cache of collected addresses, and I've since learned there is a "Mork" format to some of these have. I would like to pull out the collected addresses and retain them in the new TB 102 profile I have. Maybe Python or something.

In any case, I had been using TB 115 for a while -- no problems at all -- this just "happened" one afternoon, when I hadn't made any changes to my configuration, just regular use, which is why I posted -- I don't understand what may have caused it. I did retain the TB 115 directory (per the above) for inspection.

Thanks again.

Messages going to the outbox have really only a few causes. 1. You are not online. There is an issue with your internet connection. 2. Thunderbird is not online. Check the ((o)) in the status bar does not have a line through it. 3. You chose to send the mail later (either from a button or using the Ctrl+Enter key stroke shortcut.

Only after those three things are eliminated should a search for perhaps a bad add-on start, as they are three by design causes.