Sudden disturbing Mail behavior after moving to Sequoia

Greetings. I’m the guy that started the recent thread about new Macs shipping with Tahoe and saying that I wanted to downgrade to Sequoia.

Well, I’m having an issue with Sequoia Mail. I’m using a POP account. (Yes, I know. IMAP=good, POP=bad) but I don’t want Mail synced across my iMac, phone, and iPad. I do different things in different places. POP has always worked for my working style.

So, what’s happening is that starting just a day or so ago when I delete an email, it just disappears, poof. It’s not in either of the Trash mailboxes. Why there are two I don’t know. One has the trash can icon and the other has a folder icon. The one with the trash can icon has messages that I deleted a few days ago. The one with the folder icon never has anything in it.

In Mail-Settings-Accounts-Mailbox Behaviors I have Erase Deleted Messages=Never and Move Deleted Messages to Trash Mailbox is checked. There are no other options for the Trash mailbox. Also tried Rebuild, but nothing seemed to happen.

I did a search for one of the disappeared messages and found it and Control clicking on it had an option for Move to On My Mac which I selected and the message then appeared in the Trash mailbox (trash can icon). So how do I make the deleted messages go to Trash On My Mac be the default? Both Trash mailboxes are already under the On My Mac title in the sidebar.

This never happened before I moved from Ventura to Sequoia. Am I missing something fundamental?

Thank you in advance. John

I’ve had an excess of seemingly homeless Trash cans since before Sequoia. Now that I backed out of Tahoe and reinstalled Sequoia, there is a growing list of stuff that didn’t happen in Sequoia the first time around. Most of it trivial annoyances that I just don’t have the time or patience to run down now. But if I make any sense out of the Trash cans, I’ll let you know.

I just experienced a related issue (Sequoia Macbook Air). I sent an icloud email using the Mail app and waited for the “undo send” period to end. Then I quit Mail. It disappeared from the outbox but did not appear in the Sent box. Bizarrely it does appear in the sent box of my iPhone.

Ah - it appeared after several minutes when I used Get New Mail!

Sort of a solution. If I want to delete a message, instead of clicking the trash can in the toolbar or selecting Delete under Edit Menu, I simply drag it to the Trash Mailbox. Voila! There it remains in case I have to go back to it.

This isn’t the way it’s supposed to work but it does work. Oh, Apple…