I get this error message about every 15 seconds, and it roadblocks everything I'm typing. Nothing is more irritating than this. I've searched online, and it doesn't appear to be a common problem — especially when I'm not even trying to move any messages anywhere. I think this started before I moved to OS Monterey.
Anybody know what this is or how to kill it?
iMac 27″, macOS 12.5
Hello Brie-Eating Surrender Monkey,
Thank you for reaching out to Apple Support Communities.
These steps may help:
"Move emails
on your Mac, select one or more messages.
in the Mail toolbar (you may need to first click the More Toolbar Items button 
), then choose a mailbox (or use the Touch Bar). Mail may suggest a mailbox based on where you’ve moved similar messages in the past.If you move a message that’s part of an email conversation to another mailbox, it becomes a related message, but is still shown in the conversation. See View email conversations."
More details can be found here: Move or copy emails between mailboxes in Mail on Mac
If the issue persists, can you provide a few more details? Does this happen with one specific mailbox? What types of accounts are you using? Also, when did you first notice this?
Cheers!
The message “” could not be moved to the mailbox “xxxx”
