Postini bug

Ben over at MailChimp has an article talking about a recent experience with Postini and an actual bug that causes Postini to interact badly with another spamfilter and block non-spam.

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More on spamfiltering feedback

Al wrote a post commenting on my post from last Thursday on spamfilters talking to senders who are being filtered. I think his take on it is close to mine. I would point out that Google has a pretty opaque system and no feedback to senders, but a lot of people seem to think their filters are accurate and do a good job.
Overall, I think there is room for discussion and feedback between senders and recipients, but on both sides the goal needs to be improving the enduser experience.

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Affiliates: what is a company's responsibility

Many of my clients come to me when they end up with delivery problems due to the actions of affiliates. These can either be listings in some of the URL blocklists (either public or private) or escalations of IP based listings. In many of the cases I have dealt with affiliates, the affiliates have sloppy mailing practices or are out and out spammers.
Recently the FTC settled with Cyberheat over their liability for the behaviour of their affiliates. In this settlement Cyberheat is required to monitor their affiliates as follows:

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Blacklisted on FiveTen: no big deal

Al posted an analysis on DNSBL Resource about the effectiveness of the FiveTen blacklist.
He says:

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