Moving messages (from showing a thread as a list) on different accounts to the same folder.

[tessarakt]

Following use case: I have my INBOX on IMAP, and my Sent folder locally. Sometimes I show a thread as a list (opened in a separate tab).

Then I mark all messages of the thread, press M, and select a folder where that thread should go.

Expected result: All messages are moved.
Actual result: Only the messages from INBOX are moved.

Moving the remaining messages from Sent "again" then works just fine.

It seems there is something going internally that prevents moving messages from multiple accounts being moved together.

[micz]

I tested your use case and I found this:

1. email A in IMAP Inbox and email B in Local Folders (B is a reply to A, so they are linked)
2. I show them in conversation view.
3. Move them in another IMAP folder, selecting them together.
4. email A is moved in the destination IMAP folder.
5. email B is copied in the destination IMAP folder.

If I move email B alone, it's moved in the destination IMAP folder.

May you confirm this behaviour?

[tessarakt]

Ah, I only looked at the list view, where the messages from the other account still remained, so I assumed they were not touched.

But now I looked in the destination folder, and indeed, the messages by myself (which were in the local account) appear there twice.

So from that result I can confirm your observation, yes.

[micz]

Thank you for your feedback.

It seems to be a Thunderbird API error, I filed a bug https://bugzilla.mozilla.org/show_bug.cgi?id=1950442.