One of the main projects I’ve been working on for the past few months has finally come to fruition: an upgrade of the email service at dublin.ie. In early December we upgraded 11,000 users from a system based on @Mail 3.6 to one based on @Mail 4, running on new hardware with about 10 times the storage.
The upgrade has finally allowed us to start dealing with the spam issue effectively, as @Mail 4 has built-in support for SpamAssassin and users can make use of Bayesian filtering to train the spam filter. To give you an idea of the scale of the problem, on a typical day we block more than 50% of all messages received as spam. Today’s stats are 12,254 messages received, 14,453 blocked by the spam filter.
As part of the upgrade, we also created an email service for another public service agency, which will be run on a pilot basis. In 2005, dublin.ie will be introducing a premium version of the email service for a small annual fee, but the intention is to always provide a free version.