Mail app crashes every time - never starts up

Question

I sync'd and updated iphone with podcasts mp3s etc
after that sync, my mail app will not launch. It seems to get the # of e-mail showing on the notification on the mail icon; however, it will not launch once touched.
It seems to try to launch but shows a white screen, delayed about 2-5 seconds then back to the main screen
I have re-booted the phone 3-4 times and doesn't help it
I haven't re-synced the phone b/c that computer that I sync with is at work and not home. so, will try that later when I get to the office.
Other thoughts or has anyone had similar issues?
TIA!!

Answer 1

Well, I tested a few more things in regards to my problem.
Before the reset which you had suggested above, I had already turned off my e-mail accounts and made them 'inactive' --- except for one ...
I finally turned that one off or made it inactive then turned on another one - and my mail worked on my other account(s) (I have about 7 or so mail accounts setup)
All of my mail accounts are using GMAIL.
Now, I start toggling ALL of my mail accounts back on - all work.
I get to my main account (which was failing before) -- and sure enough, I go to INBOX and it crashes the mail app.
I narrow it down to where I can go to a lot of other folders on my main account, it works. ONLY when going to my INBOX on this one account does it fail... and then, I guess the MAIL app tries to recall where it was b/c it continues to crash until I make that mail account 'inactive'.
So, I think somehow this particular GMAIL inbox is corrupted with my iPhone mail app - I have no idea on this other than maybe deleting my account and re-setting it back up on my iPhone.