iphone mail always shows "downloading 1 of 1" never finishes?

hi delete your mail account and just reset your network settings ... then you have to creat your mail account .

Deleting your mail account is a bit drastic and unnecessary. Instead - give the following process a shot:

1. Close down mail (i.e. double press the home button, hold on the mail icon until it starts to wiggle, then hit the minus sign).
2. Turn off your mail accounts
   1. Go to Settings --> Mail, Contact, Calendars
   2. Go into each account listed and flip mail from On to Off
3. Click the home button to exit settings
4. Start Mail - you should see the selection screen asking you what kind of mail account you want to create. More importantly you should not see the "downloading" at the bottom.
5. Click the home button to exit mail
6. Turn your mail accounts back on
   1. Go to Settings --> Mail, Contact, Calendars
   2. Go into each account listed and flip mail from Off to On
7. Click the home button to exit settings - get into mail and everything should be back and the "downloading" should be gone.

I hope this helps.

Nice. I was also wondering if this specific email contained an attachment with a huge file.

Thanks upstateny you sorted it for me.

This fixed my issue... actually, just steps 1-4 helped.