I have my Comcast mail set up on my iPad. It is set up as a POP account. I have it set up to delete a message from the server after I have deleted it from the inbox. It does not happen. Several minutes later, all the messages download again. This costs a lot of money when you are traveling internationally. Any ideas on how to not have them re-download?
Comcast has an Mail app. You might want to think about using that instead of the Apple Mail app. Maybe they wrote the app t get around the problem you noted. There site is very sparse on setup for iDevices.