I’m getting a strange bug in the Big Sur macOS Mail app. I have a rule that automatically moves mail from my work MS Exchange Inbox and places it into my work Gmail Inbox. On my Mojave laptop (Mail Version 12.4 (3445.104.15)), this works great and the emails show up in Gmail’s inbox.
In the Big Sur version of Mail, the rule works just fine to move the email into the Gmail account; however, it doesn’t show up Gmail Inbox. I have to go to “All Mail” to see the message. I’ve tried to delete and recreate the rule, but that didn’t fix anything. I don’t want to forward it because I don’t want to “FWD” in the subject line and header of the email.
Edit: I also acknowledge that forwarding directly via my work exchange account is the “best” option, but my employer won’t let me do that.
The only thing I can think is that macOS Mail somehow strips the “Inbox” label and it didn’t in the past.
If Apple mail, doesn’t offer a “mark as unread” option in rules, Thunderbird mail does.
Over the years, I have set up TB mail just to move mail between accounts both for myself and others. I would set it to open on logon, leave it running minimized, and use Apple Mail for everything else.