Bug when moving messages out of Smart Mailboxes

Sure, they could write special code to work with Gmail’s goofiness, but that doesn’t make much sense. They’d have to keep chasing any changes Gmail makes. IMAP is a stable protocol used everywhere.

Gmail isn’t IMAP at all. The biggest issue is the lack of folders and the capability to mark a message such that it appears to exist in multiple folders. Gmail claims it can be POP or IMAP. If so, it should handle standard IMAP protocol messages sent by an IMAP client. It obviously doesn’t.

Every IMAP server I use can correctly process the move request of a message when initiated from a Smart Mailbox.

There might be some email clients that work with Gmail directly. Try one of those. Or, tell apple you want full Gmail protocol support.

Smart Mailboxes are a search. When you move them, you are moving the original item. It won’t “move” from the Smart Mailbox unless the location is part of the Smart Mailbox criteria.

As to the other questions, I don’t have any experience with those. I don’t cross-pollinate my email accounts and can’t imagine why I’d ever copy an email. It does sound like the database trigger isn’t covering all the bases.

I'm curious why you're getting different behavior than I am. Are you also working with a Gmail account?

No. That’s why I get the correct behavior and you are getting the Gmail random oddity of the day.

Gmail isn’t IMAP, but it does pretend to be. Since Mail thinks it is IMAP, it sends the IMAP command to move from the inbox to the new mailbox. Gmail receives the IMAP instructions and sets about manipulating the labels. It should remove the Inbox label and add the “new mailbox name” label.

I don’t know what transpires after that, but it appears to fail.

The original location (Inbox) is part of the Smart Mailbox criteria. So what Mail should do is remove the Inbox tag from the message being moved, just as it does when the message is moved directly from the Inbox. Otherwise, it's doing a copy and should indicate as such to the user.

Mail doesn't "tag" messages for organization. It's either in a folder or is not in a folder.

Gmail does tag emails with multiple Labels. Is it a Gmail account?

In Mail, dragging doesn't copy unless you hold down the command key when dropping.

I cannot replicate the behavior you describe. If I move a message from a Smart Mailbox that includes messages in the Inbox, it disappears from the Smart Mailbox as soon as I move it to another mailbox.

How would it be an Apple bug if all IMAP email servers work, but Gmail, not a true IMAP server, doesn’t work?

I’m not sure what more can be said. Until Gmail fixes its compatibility with IMAP, it will always be painful to use in a standards compliant email client.