Copy (only the) E-Mail Address in OS X

Sometimes when you are in OS X and you copy and paste an EMail address from Mail.app you get something like:

Jeffrey Jackson <username@domain.com>

You only wanted the email address, not this. We can fix that. Close Mail and open Terminal.

defaults write com.apple.mail AddressesIncludeNameOnPasteboard -bool NO

Now open mail and try again you should just get the email address:

username@domain.com

Now go email someone.