17 Feb
2010
17 Feb
'10
7:35 p.m.
When we licensed Spamhaus a few years back, they required us to set-up a DNS slave server instead of querying against their public server. They had a special DNS client that allowed partial zone updates. Turns out we downloaded huge hourly updates.
They now give you the choice of rsync or queries to non-public servers. Unless you have a humungous mail system, queries are cheaper and certainly less hassle.
We no longer use Spamhaus, relying instead upon Sender Base Reputation Scores (IronPort).
How does the price compare? R's, John