iOS: Unable to send or receive email
Can’t Send Emails on iPad – Troubleshooting Steps
Setting up and troubleshooting Mail
Using a POP account with multiple devices
iOS: Adding an email account
iOS: Setting up an Outlook.com, Hotmail, Live, or MSN email account
iPhone, iPad, iPod touch: Microsoft Outlook 2003, Outlook 2007, Outlook 2010 may not display contacts and calendars after sync
Server does not allow relaying email error, fix
Why Does My iPad Say “Cannot Connect to Server”?
Gmail Account Will Not Connect to Gmail Server
How to Delete Email on the iPad
How to Mass Delete Emails from iPhone and iPad Inbox (with video)
How to delete ALL mail messages from iPhone/iPad in one step
How to add, send and open iPad email attachments
How to Sync Contacts with Your iPad Using iTunes
Importing a Contact List CSV to the iPad
iOS: ‘Mailbox Locked’, account is in use on another device, or prompt to re-enter POP3 password
iCloud: Create a group and add contacts to it
eMail Groups - You can use a third party app that many users recommend.
Configuration problems with IMAP e-mail on iOS with a non-standard SSL port.
Try this - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.) No data/files will be erased. http://support.apple.com/kb/ht1430
Or this - Delete the account in Mail and then set it up again. Settings->Mail, Contacts, Calendars -> Accounts Tap on the Account, then on the red button that says Remove Account.
How to delete an email account on your iPad