IOS4 reloads and repopulates all emails when entering Mail app

Question

I'm having similar, but somewhat different issues with my email since updating to ios4 on my 3GS. I haven't been able to find others with the exact same problem, hence the new thread.
Here is the issue:
Since upgrading, every now and then randomly, when I enter the mail program, it will start to _re-populate/re-load all of my emails from scratch_, as if my 2 email accounts were just created and I am going into it for the first time. I will see "downloading 400 messages" (I set it to 200 maximum for my 2 email accounts). My 2 email accounts are set up as enterprise -- one is Gmail Enterprise and one is my work account.
Needless to say, this is not only a HUGE battery drain but populating 400 messages is painfully slow not only on WIFI, but can completely cripple the phone on 3G. It takes about 20 minutes EACH TIME for all of my folders/inboxes to reload and populate with all of my emails, finish indexing and and threading.
This is a MAJOR issue, Apple. Email is at the heart of how I, and most people these days, communicate with friends and coworkers.
Is anyone else experiencing this?

Answer 1

YES, YES, YES, TomLapple! I have been having the EXACT same problem as you! My phone and mail worked just perfectly fine until Apple decided that it needed to update the software. Everything has just gone south since I've upgraded.
I have set up my work email on my iPhone 3G and since the update, it downloads literally EVERY SINGLE EMAIL in my account - including emails that I started receiving since July 2007 when I first started working for the company. Yes, I said 2007. That means that anytime I open up my mail on my iPhone, it says that there are more than 4,000 emails to be downloaded. I have actually (stupidly) started the process of trying to download and delete them all several times. A couple of times I've deleted them down to 2,000 and today managed to get down to around 900. What happens? For some strange reason, the phone appears to stall and blinks off, going straight to the black screen with the silver apple. When the phone restarts again, I go back to my email and what is waiting for me but all 4,000+ emails. I am so frustrated I want to pull my hair out. Does anyone have any idea how to stop this problem? Many people have said that restoring the phone does nothing to help.
I've also noticed that my battery can no longer take me through the day. That really upsets me because I could charge once in the morning and it would be fine until I got home that evening. Now the battery is drained within hours, even with me doing exactly what I've been doing in the past. Call me crazy, but I almost feel as though Apple is deliberately making this hard for everyone so they'll want to upgrade to the iPhone 4. Apple, MAKE SOME PATCHES TO SOLVE THIS PROBLEM!!!!!!!!!