Hyperlinks can point to anything, not just to Web pages. You can create e-mail hyperlinks, for example, that start the user’s default e-mail program, create a new message, and enter the recipient’s address. (You can also set it to fill in the message subject, if you like.)
E-mail hyperlinks are useful when you want to direct someone to send a message to a particular person. For example, it is common to include a link to e-mail a site’s webmaster. To create a hyperlink to an e-mail address, use the same href= attribute as you did previously, but instead of a Web address, type mailto: followed by the e-mail address, like this:
<a href="mailto:firstname.lastname@example.org">Contact Us</a>
Not everyone who has Web access also ...