Self-hosted MX

After using Hisoka as my main SMTP server for a couple months, I decided to make it the main MX for leapingtiger. Any mail addressed to <whomever>@leapingtiger.org should now be handled by hisoka directly — once DNS entries are updated.

If you have an @leapingtiger address, I strongly suggest testing it in the next couple days and write to support-accounts (@) leapingtiger.org.