In order to fool the “spam bots” that look on web sites for email addresses, MaxWiki automatically detects email addresses on a page and encodes them. However, if it doesn't recognize the email address (usually because there are characters before or after it), you can encode the email manually by going into Source mode and using:
<%= email('info@maxiwiki.com') %>
This produces a link like this:
This link works fine, but it is encoded to fool the spam bots.