Z:gnu-www-ja-fsf-html-style-sheet--56ae0c-It is less confusing to the us/en

It is less confusing to the user, because it's clear what is a http: link to another WWW page and what is a mailto: anchor that will bring up a mail form to fill out and send, if this is supported by the client. Also, if the user saves a copy of the page, he will have a copy of the e-mail address he can use, without going back to his web browser. If the person doesn't have a web page, leave the name unanchored.