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The bit about 'filters that fight back' is interesting. ( http://www.paulgraham.com/ffb.html )

I didn't like this bit, though:
"But there are a few cases where this isn't true: the urls at the bottom of mails sent from free email services like Yahoo Mail and Hotmail, for example."

Followed by "to protect such sites...". Tsch, it would be better to not protect such sites, and instead have them stop shoving their bloody URL at the bottom of emails all the time to reduce wastage of their server resources.

And tsk, a nod being given to that as a problem, and no mention of the possibility of someone deliberately denial-of-servicing lots of sites by sending out spam with the target URL in it. The result of such filters becoming prevalent would be that the next Sobig or Blaster worm would shove hundreds of Microsoft URLs in their emails.
RavenBlack - Tue 16 Sep, 06:43:30

I presumed that was what he meant by "abuse", in the same paragraph.

But what's wrong with people like Yahoo putting a URL at the bottom of emails sent by their non-paying users?
Kevan - Tue 16 Sep, 10:13:32

I don't mind Yahoo's, but MSN's "HOT FREE EMAIL" often gets its users eaten by my spam-filter. I expect Yahoo might well do the same - I just don't get many emails from people who use Yahoo mail because, well, it's shit.
RavenBlack - Tue 16 Sep, 14:17:44

New comments have been disabled for years, now, as this blog is no longer updated. Sorry.