I am having a problem that I can't find an answer to, even on the web or Apple site. When I try to delete messages from my bulk folder, I get this message: The IMAP command “UID COPY” (to Deleted Messages) failed for the mailbox “Bulk Mail” with server error: UID COPY Server error - Please try again later.
I ran Disk Utility. I quit Mail and reopened it. I have not rebuilt my mailbox, though I don't even see an option to do so. And, I am afraid of what that might do.
MacBook Pro - Sierra 10.12.6, Safari 12.1.2
iPhone 5s Version 9.3.2 iTunes 184.108.40.206