Certifying email senders

Last month, in an item about SpamBayes, I mentioned IronPort's SenderBase service and Bonded Sender (1, 2) program. SenderBase is an extraordinary resource for investigating email senders. The homepage lists the top high-volume senders, but you can drill all the way down to small-fry IP addresses. If you're on a DSL or cable connection with a static IP address, try looking yourself up:

Former URL: http://weblog.infoworld.com/udell/2003/06/20.html#a728