Question: Apple Mail is Duplicating Mailboxes
Since the supplementary Update of High Sierra 10.13.3 I have had problems with Apple Mail.
1) Jamming randomly when deleting emails - gets jammed with message eg - 'moving messages 1 of 10'
2) Duplicating Mailboxes and sending email to these rather than my existing ones.
3) Attaching 'new emails' to old ones. The header and subject line from an old email and the body and text is a new email.
I would love if someone has a fix for this.
MacBook Pro with Retina display, iOS 10.3.3