Can we get a Twitter user's e-mail address using the Twitter API -

if have user's twitter id or handle, can e-mail address of id?

your question confusing here rule receiving users' email.

• your application must have been approved twitter. more details can found @ https://dev.twitter.com/rest/reference/get/account/verify_credentials > request user’s email address. when using form have pick i need access special permissions , inform want application have access user's email.
• when approved need refresh application keys.
• when done need users re-authorize app new keys.
• finally when call account/verify_credentials endpoint receive user's email.