Although I appreciate your collaboration on the issue, the last 2 posters clearly do not truly understand the issue. If it could be remedied by this, we would be doing that already.
My phantom emails can only be purged by removing the account, power cycling the phone, and readding the account... only to have it occur again at some random future point. Right now I have 3 in my drafts folder, 3 in Junk, and 1 in trash. This is MUCH better than it has been in the past admittedly as it has been some time since I "refreshed" my account with the above procedure. Usually in the past they would accrue up to the triple figures before I would "refresh" out of frustration. I am unaware if something has changed, but it doe seem better.
To the last 2 posters, these emails are not in any subfolder, hidden, or can be removed by "marking all as read." They are phantoms, they are not there physically (unless stuck in a cache file somewhere in the mail app) and cannot be viewed or modified by any means.