HTC Droid Incredible

After getting the 2.2 update i have been having a problem one of my email account . I have 5 on my phone and since update one of the emails is is being deleted without me doing this . They are there and when i go back to check again there gone ? this is only happing in one email account . any one having this problem or know why its happening ? also i have deleted and added this account back 2 times with same results .