Don't automatically delete old messages
don't automatically delete conversations older than 18 months
I desperately need to view messages from 2019, plus there are priceless pictures from several years ago that are just GONE!!!
Sometimes when a mailbox behaves like this it’s because of another program or app the account is being accessed from. Syncing issues between the account and a mail app can cause emails to be moved around oddly.
If you access the account through a mobile device or app, you may want to remove the account from the device and re-add it to resolve any syncing issues in the future.