Help:E-mail

Functionality
If you add your e-mail address to your account (at time of creation, or later) you will get additional functionality:
 * The E-Mail Verification process increases credibility and therefore speeds up account creation.
 * You can communicate with others local users not only publicly via their talk page but also privately via personal mail provided that they added their e-mail and configured it for this purpose.
 * You can get several kinds of notification mails like notes that your talk page has been changed.

Liberty
For the creation of a new user account your e-mail address is not required.

You can withdraw or change the e-mail address associated with your account any time, as often as you like and whether or not the last address got verified or not.

Privacy
Only Sysops with Check user rights can see your e-mail address, along with those local users whom you wrote a private mail via Email this user function.