Originally Posted by alex.dobeck
-- Please don't delete your email account and re-ad (no offense Alex)!! It will solve nothing. I have been able to get the dreaded yellow triangle to go away.
Whatever POP/IMAP account you are using, simply login to the main account and delete unwanted, suspicious, SPAM emails, etc. and make sure you empty your trash, bulk mail folders as well. In my case, I had multiple phony "Mailer-Daemon" failure notices and unsolicited emails in my inbox on the server.
Next sync your inbox on the Pre in the specific affected folder (not via All Folders). That SHOULD do the trick.
If you are having difficulty figuring out where the email(s) is/are (some people have hundreds a day), try limiting the amout of emails that are diplayed on the Pre first. Heck, start with 1 day, then 3 days, 7 days, 2 weeks, etc. until you can pinpoint when the triangle begins to show.
Not sure if it's a cureall, but it worked for me -- and I was struggling with this for several days!!!