[Postponed] SpamTitan upgrade

Update 22:30: due to complications with the upgrade we have reverted to our old server. We are in contact with SpamTitan support to resolve the issues with the upgrade and will make a 2nd attempt to switch to our new server at a later date.

22:15: We are upgrading our SpamTitan server to the latest build running on a newer, faster hardware. Please bear with us. There may be some delays on incoming mail during the upgrade.