nanog mailing list archives
Re: ** Forged spamming going on
From: Jon Lewis <jlewis () inorganic5 fdt net>
Date: Tue, 22 Dec 1998 01:13:19 -0500 (EST)
On Mon, 21 Dec 1998, Robert Tarrall wrote:
alex () nac net wrote: -> some luser off of AT&T DIalup is using mailme.com (my domain) for relaying -> mail: -> Received: from mailme.com (146.st-louis-71-72rs.mo.dial-access.att.net -> [...] -> He is sending thousands of emails to AOL users, who is then bouncing them -> to me. -> [...] -> Thinking about this, there is no solution; here are my options: -> You forgot: 4) Deny relaying, which sendmail 8.9.1a will do by default (has worked great for us so far), and
I almost said that, but then I read the header he posted. This wasn't a case of relaying...it's just "from address forgery". The same problem I posted about a week or two ago. Some moron sends out a few hundred thousand messages relayed through a variety of 3rd parties, claiming to be from idontexist () yourscrewed com yourscrewed com being your domain. When the 3rd party relays fail to deliver tens of thousands of messages because the spammer bought a 3rd rate address list full of bogus addresses, guess where the bounces go?
5) Deny access to dial-access.att.net (and dialsprint.net,da.uu.net, pub-ip.psi.net, etc) which is what we're doing here just because we get so much spam directly from such dialup accounts these days.
And if you use a service like iPass, this becomes highly inconvenient for your customers unless you've setup a relay after pop3 hack. ----don't waste your cpu, crack rc5...www.distributed.net team enzo--- Jon Lewis <jlewis () fdt net> | Spammers will be winnuked or Network Administrator | nestea'd...whatever it takes Florida Digital Turnpike | to get the job done. ______http://inorganic5.fdt.net/~jlewis/pgp for PGP public key________
Current thread:
- ** Forged spamming going on alex (Dec 20)
- Re: ** Forged spamming going on Derek Balling (Dec 20)
- Re: ** Forged spamming going on Steven J. Sobol (Dec 21)
- Re: ** Forged spamming going on Phil Howard (Dec 21)
- <Possible follow-ups>
- Re: ** Forged spamming going on Robert Tarrall (Dec 21)
- Re: ** Forged spamming going on alex (Dec 21)
- Re: ** Forged spamming going on Stephen Stuart (Dec 21)
- Re: ** Forged spamming going on Steven J. Sobol (Dec 21)
- Re: ** Forged spamming going on Jon Lewis (Dec 21)
- Re: ** Forged spamming going on alex (Dec 21)
- Re: ** Forged spamming going on Robert Tarrall (Dec 21)
- List of dialups (was Re: ** Forged spamming going on) J.D. Falk (Dec 21)
- Re: ** Forged spamming going on Dean Anderson (Dec 21)
- Re: ** Forged spamming going on J.D. Falk (Dec 21)
- Re: ** Forged spamming going on Steven J. Sobol (Dec 21)
- Re: ** Forged spamming going on Paul Vixie (Dec 21)
- Re: ** Forged spamming going on Dean Anderson (Dec 21)
- Re: ** Forged spamming going on Dean Anderson (Dec 21)
- Re: ** Forged spamming going on Steven J. Sobol (Dec 21)
- Re: ** Forged spamming going on Dean Anderson (Dec 21)
(Thread continues...)
- Re: ** Forged spamming going on Derek Balling (Dec 20)