John Sequeira

Amped::Technology
John Sequeira's weblog: enterprise application development, typed weakly.

Tuesday, March 04, 2003


Email load balancing

I use pobox.com for my email address. pobox runs a forwarding service -> for about $20/yr they will forward any email they receive to a number of different accounts. I signed up for it because I was tired of notifying everyone in my address book when my ISP went belly up, got acquired, rebranded etc. I've always had two email accounts registered with pobox -> one free webmail account and then my ISP. That way, I essentially load balance my email. If one provider goes down, the odds of the other one being down at the same time are vanishingly small. And what about my single point of failure, pobox? Their building was flooded once, and had to be evacuated for a weekend. Mail just queued up and was sent out a day late. That's one day of interruption in about 5 years.

Having the same mail feed go to different place allows me to compare spam fighting techniques. For instance, my old computer runs Outlook/Cloudmark, my new computer runs MozillaMail/Bayesian Spam Filtering, and fastmail runs SpamAssassin. pobox will tag likely spam, but I'm not sure what they're using. It's quite a gauntlet. I really like Cloudmark's ease of use, and collaborative filtering's small likelihood of mis-tagging email that's just for you. MozillaMail's anti-spam is up there, but it's only been a couple of weeks since it's had the capability to move tagged mail to a different folder (hooray!). It's young but promising. It's hard to tell how good SpamAssassin works, because it's server configuration is not something tailored to me... it has to work for all the fastmail users, and let's just say the way it's configured bad stuff gets through. Looking on the bright side, it means I didn't waste my time training my Bayesian filter.

one more spam thought

When will someone implement a pronouncability metric, to catch Bayesian-avoiding 'sddfjshjherew' subject lines? Does one of the many SpamAssassin heuristics not look for this already?

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