There is a link at the bottom of the forum pages labelled "Contact Us". This executes a script that sends an email to one of the moderators.
We had an incident recently in which one of our long term members got suspended, and created a temporary account for the purpose of contacting the mods to question the suspension, and plead a case for ending the suspension. This action was a violation of the sock-puppet rules, even though no posting to the public forum was done by this member. After some discussion about what options were available, the admins and mod team have decided that going forward anyone who is temporarily unable to post because of a suspension should use the "Contact Us" link. Going forward all violations of the sock-puppet rules will be treated as advertised, and result in being banned.