${username} would probably have been to easy for scrapers to use, so I upped the challenge a little. There's no[0] spam filter in front of that mail and so far

${username} would probably have been to easy for scrapers to use, so I upped the challenge a little. There's no[0] spam filter in front of that mail and so far I haven't received any spam, so it seems to work. On the other hand, I've actually never been contacted, so maybe it's too challenging ;-) [0] Invalid MXes will be rejected by my hoster, but there's nothing like a Bayesian spam filter.