https://tech.kateva.org/2018/04/marsedit-don-enable-all-post-sync-if.html
Gordon's Tech: MarsEdit - don't enable all post sync if you have a very large number of posts
Technical fixes, tips and findings -- all based on my personal experience. Mostly macOS and iOS.
https://markedapp.com/help/MarsEdit.html
MarsEdit
marsedit