language agnostic - Extract email and name with regex

Question

What would be the regular expressions to extract the name and email from strings like these?

johndoe@example.com
John <johndoe@example.com>
John Doe <johndoe@example.com>
"John Doe" <johndoe@example.com>

It can be assumed that the email is valid. The name will be separated by the email by a single space, and might be quoted.

The expected results are:

johndoe@example.com
Name: nil
Email: johndoe@example.com

John <johndoe@example.com>
Name: John
Email: johndoe@example.com

John Doe <johndoe@example.com>
Name: John Doe
Email: johndoe@example.com

"John Doe" <johndoe@example.com>
Name: John Doe
Email: johndoe@example.com

This is my progress so far:

(("?(.*)"?)s)?(<?(.*@.*)>?)

(which can be tested here: http://regexr.com/?337i5)

Answer 1

The following regex appears to work on all inputs and uses only two capturing groups:

(?:"?([^"]*)"?s)?(?:<?(.+@[^>]+)>?)

http://regex101.com/r/dR8hL3

Thanks to @RohitJain and @burning_LEGION for introducing the idea of non-capturing groups and character exclusion respectively.