Seth Godin has an interesting post on newsletters ending up in the recipients’ spam boxe:
send out an email newsletter, you may have experienced the hassle of
being blacklisted from an ISP or web service. The asymmetrical nature
of spam makes this particularly painful–professional spammers don’t
mind being blacklisted, because they regularly switch identities. It’s
the good guys (and the amateur spammers) who get hassled.
Here’s a lens that can help good guys navigate their way through the issue.