By: ScottK
23 Jan 2008 6:23pm GMT In addition to setting up an SPF record, ubuntu-server is pretty well equipped with packages to reject mail that fails SPF tests (especially if you're using Postfix).
By: Alan Pope
23 Jan 2008 6:23pm GMT SPF :( Greylisting \o/ I use greylisting on my Ubuntu server and my spam has gone from many hundreds a day down to about 3. http://en.wikipedia.org/wiki/Greylisting