To test this, send <a href="https://www.google.com/search?q=test@example.com" title="https://www.google.com/search?q=test@example.com">https://www.google.com/search?q=test@example.com</a> or <a href="gmail.com?q=bengotow@gmail.com" title="gmail.com?q=bengotow@gmail.com">gmail.com?q=bengotow@gmail.com</a>
to yourself from a client that allows plaintext or html editing.

What about <a href="gmail.com/bengotow@gmail.com" title="gmail.com/bengotow@gmail.com">gmail.com/bengotow@gmail.com</a> - Oh man you're asking for trouble.