compare:

    * <jon+markdownbug@example.org>
    * <jon.markdownbug@example.org>

* <jon+markdownbug@example.org>
* <jon.markdownbug@example.org>

It seems putting a '+' in there throws it. Maybe it's a markdown bug, or maybe the obfuscation markdown applies to email-links is being caught by the HTML sanitizer.

 -- [[JonDowland]]