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:
You forgot:
4) Deny relaying, which sendmail 8.9.1a will do by default (has worked great for us so far), and
You didn't read the email thoroughly. A user dialed into ATT, sent thousands of emails to aol.com users, with a forged return-address of youarecool@mailme.com, which AOL bounces back to youarecool@mailme.com, which is a domain I own. Relaying on my machines has no bearing on this.
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.
Still wouldn't fix it, as AOL is the one sending me the mails (bounces).
Anyone have a list of legitimate outgoing SMTP servers for the big dialup companies (UUnet, PSI, Concentric, AT&T, Sprint, etc)? So far I haven't had any complaints about blocking stuff like da.uu.net, but I'd like to make sure that legitimate email can still get through.
That still wouldn't fix this problem, but I may do this seperately.
-Robert Tarrall.- System/Network Admin E Central
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Atheism is a non-prophet organization. I route, therefore I am. Alex Rubenstein, alex@nac.net, KC2BUO, ISP/C Charter Member Father of the Network and Head Bottle-Washer Net Access Corporation, 9 Mt. Pleasant Tpk., Denville, NJ 07834 Don't choose a spineless ISP; we have more backbone! http://www.nac.net -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --