[jodanchudan]

Emails that I pin in the built in Mail app don't stay pinned. Any ideas?

[jodanchudan]

'Flag' I suppose is the correct term.

[John Yester]

Which mail account?

I have numerous accounts with flagged items and have not had them unflagging on their own.

[jodanchudan]

Figured it out. It seems that if you have mail settings synced for say one month, anything flagged that's older than that won't stay flagged.

[John Yester]

Correct, I have everything set to forever.

[pkcable]

I edited the title and converted this to a Q&A. Gave you the "best answer" Jodan, since you answered your own question. Since we want to be able to help more people, now we will be able to!