Hi.
I've done something like that a while ago.
The problem that i had was that some mailclients didn't interpret the stuff right, though i have forgotten the exact problem we had...
However, we decided after some testing to send people a link to a website, which worked fine.
Actually most people didnt even realize that we had sent them the link because they moreless automatically clicked it and got on our site...
well.
i'd consider it since you rule out the mailclient as source of mischief this way.
greetings, jakob