Had an ipad air now have a ipad2 everything transferred over perfect..except my mail

Assuming that you are using either IMAP or POP3 mail, your email messages are not directly transferred between devices. Instead, Mail messages are downloaded from your Mail Provider’s mail server.

Assuming that you have used QuickStart to transfer data from your old to new device, your email account settings should have transferred - although in some cases, it may be necessary to manually add your mail account(s) to the new device:

Add an email account to your iPhone, iPad, or iPod touch - Apple Support

Be aware that some email providers now require the use of App Specific Passwords when accessing mail over IMAP or POP3. If this applies to your email account, you will need to generate a unique password for your iPad email account - that will differ from your normal Account Password. As examples - AOL, Yahoo, Google, Microsoft all use App Specific Passwords when using anything other than their own email client Apps.

If you need to generate an App Specific Password, you’ll need to log-in to your Mail Providers account management webpage - using a web browser - and generate the Password from the appropriate account security page.

More information about AOL’s App Specific Passwords can be found here:

https://help.aol.com/articles/allow-apps-that-use-less-secure-sign-in?guccounter=1

For Yahoo, more information can be found here:

https://help.yahoo.com/kb/SLN27791.html

For Gmail:

https://support.google.com/mail/answer/185833?hl=en-GB

Microsoft:

https://support.microsoft.com/en-us/account-billing/using-app-passwords-with-apps-that-don-t-support-two-step-verification-5896ed9b-4263-e681-128a-a6f2979a7944