After upgrade to 6.1 on my iPhone 5 i have problem with sending mail.
I use Gmail and Exchange (Gmail) with second verification on my iPhone.
The problem is that mail app shows "sending..." about 10 min, than send one.
I tried reload iPhone delete and setup settings and there nothing. After first sent mail it works ok, i can send and receive mail, but if I close mail app - problem appear again. And i need to wait about 10 min to send second mail.
With iCloud mail there is no problem.
There might Gmail bug, I don't know...
What should I do?
I fixed my problem today. The problem was, that after i have upgrated to 6.1 mail app was not in notification center.
I turned on mail app in notification center settings and it works ok. Now i can send and recieve message with no problem. I do not know how it depends on, but this solved my problem.