Written by me@grafxflow
You may have an issue when trying to delete old messages going back a few years in your Apple Mail but...
While in the Apple Mail application choose the following...
Mailbox/Rebuild
Plus make sure you have a folder selected whether it be in your inbox or sent.
Founder, Grafxflow
I am a Full-stack Developer who also started delving into the world of UX/UI Design a few years back. I blog and tweet to hopefully share a little bit of knowledge that can help others around the web. I build lighting-fast dynamic content engines with Laravel, Winter CMS and Tailwind CSS. Thanks for stopping by!