Obfuscation of email via the [email]...[/email] shortcode syntax using built-in WordPress Codex functionality.
Alternative variations:
[email]user@example.com?subject=foo+bar&body=baz[/email]creates a mailto: link with subject and body pre-populated[email nolink=1]user@example.com[/email]just displays the email without a link wrapping it[email linktext="click here"]user@example.com[/email]displays the text “click here” with a link to the email address