its best to work around it with a php mail script, there are plenty of free ones/tutorials on it around the net if you need help. using "[link]" is captured by bots who store it on a database for spammers. you could also make the link from a small flash movie, where you can use the "mailto:" command without worrying about bots.
i.e. flash script would be something like this (from the top of my head):