iPad won't send mail

Open the Mail app, double top the Home button, hold down on the Mail app in the task bar until the red minus sign appears, go back to the Home screen and try again. If that does not work try a Reset [Hold the Home and Sleep/Wake buttons down together for 10 seconds or so (until the Apple logo appears) and then release. The screen will go blank and then power ON again in the normal way.] It is 'appsolutely' safe!

Not sure if this has been solved or not, but I just had the same problem.

I had to re-enter all the outgoing mail settings as all the smtp data had been removed from both email accounts attached to the iPad. Once I had done this all worked fine.

iOS: Unable to send or receive email

http://support.apple.com/kb/TS3899

Can’t Send Emails on iPad – Troubleshooting Steps

http://ipadhelp.com/ipad-help/ipad-cant-send-emails-troubleshooting-steps/

iPad Mail

http://www.apple.com/support/ipad/mail/

 Cheers, Tom 😉