[Mimedefang] Blocking DSK & Cable modem users.

[listuser at numbnuts.net]

On Wed, 21 May 2003, Steffen Kaiser wrote:

> Seeing this, I do disagree with using these sort of stuff, because they
> (DUL list providers) say: Go and use your ISP's mail server to relay mail
> into the world. My provider at home actively gives away the information
> about all IP addresses they assign to dial-in computers, but do not offer
> a mail relay that let me send mail "as a role", with other words: They
> always shape From: and even Reply-To: to an email address they've assigned
> to me. Stuff like this makes me (as admin) to not support DUL lists,
> because they are currently only misused by ISPs to collect yet another
> fee, as if AUTH/TLS and to _not_ mangle the headers would be more resource
> consuming than their standard non-AUTH/TLS, but header mangling mail
> relay.

This is the problem with DUL lists.  IMHO no ISP should force its 
customers to use it's own domain for outgoing email.  That's just plain 
wrong.  If they want you to do advertising for them then they should pay 
you for it.  Ask them to. :)  Somewhere I say a blacklist for providers 
that rewrite or mandate the From.  I can't remember where I saw it though.

> BTW: There is another nice thingy, many ISPs get blocked as well:
> http://www.rfc-ignorant.org/ ;-)

Ah yes.  You've got to love these lists.  I don't recommend blocking based 
on them though.  I'd highly recommend you score against these.  You'll 
block a lot of legit mail if you block with these.  You didn't want to 
know you were outbid on eBay, did you? :)

Justin