Date: Fri, 5 Feb 1999 00:32:19 -0500 (EST) From: spork <spork@super-g.com> To: jack <jack@germanium.xtalwind.net> Cc: Bill Fumerola <billf@chc-chimes.com>, freebsd-chat@FreeBSD.ORG Subject: Re: ports/9864: make rblcheck use relay.orbs.org instead of dorkslayers.com Message-ID: <Pine.BSF.4.00.9902050025040.28271-100000@super-g.inch.com> In-Reply-To: <Pine.BSF.4.05.9902041536160.13910-100000@germanium.xtalwind.n et>
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On Thu, 4 Feb 1999, jack wrote:
> You're absolutely right. However, complaints to uu.net, psi.net,
> netcom.{com,net,ca}, att, mci, etc. have not reduced the amount
> of spam I received from those sources in the least. Blocking
> their dialup ports has reduced it by much more than 50%.
And as someone with an address on 99% of all spamdiscs out there, I
concur. I also receive postmaster mail here, so I get even more... Here
we see about 60% of spam coming from the dialup ports of large providers.
Sending mail to their abuse departments does nothing. If it's a smaller
provider, I generally get a nice note back stating the account was
cancelled.
> It's not a matter of passing judgment on the type of connection
> someone has, it's a matter of what keeps that crap out of my
> mailbox.
Again, you are correct. Some software out there now does a "dictionary"
attack, er, delivery where it tries tens of thousands of usernames that
result in as many bounces. If I can block this abuse (and when it brings
your mailserver to it's knees, that is abuse) I will do it. A host with a
dynamic IP has no business sending mail unless it's through a relay.
I think you'll find:
1) large providers do not even give out static addresses
2) smaller ones (like us) have those in a seperate block from the dynamic
pools, making it easy for someone to leave the static IPs alone. There's
also some sense in doing it by name. Blocking *.da.uu.net will not hurt
static IP customers. If you have a static IP, you are most likely going
to be named something.blah.com with no special naming convention that
identifies you as a dial access user.
Charles
> --------------------------------------------------------------------------
> Jack O'Neill Systems Administrator / Systems Analyst
> jack@germanium.xtalwind.net Crystal Wind Communications, Inc.
> Finger jack@germanium.xtalwind.net for my PGP key.
> PGP Key fingerprint = F6 C4 E6 D4 2F 15 A7 67 FD 09 E9 3C 5F CC EB CD
> enriched, vcard, HTML messages > /dev/null
> --------------------------------------------------------------------------
>
>
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