Date: Tue, 28 Sep 1999 18:20:28 -0700 (PDT) From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> To: tlambert@primenet.com (Terry Lambert) Cc: jack@germanium.xtalwind.net (jack), gjp@in-addr.com, n@nectar.com, chat@FreeBSD.ORG Subject: Re: Filtering port 25 (was Re: On hub.freebsd.org refusing to talk Message-ID: <199909290120.SAA17878@gndrsh.dnsmgr.net> In-Reply-To: <199909282348.QAA14375@usr07.primenet.com> from Terry Lambert at "Sep 28, 1999 11:48:07 pm"
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> > Today Gary Palmer wrote: > > > It doesn't, but direct-inject and relay-rape spam is a major problem. > > > How do you propose that large ISPs combat abuse of their dialups to > > > create this problem? Forcing the spam to go through their own SMTP > > > servers, where it can be logged, tracked, rate limited and noticed > > > much earlier is a BIG step in the right direction. UU Net is doing > > > this for all of their resold dialups because of the major problems > > > they had. > > > > This is the second time I've heard that UUnet is blocking port 25 > > from their dialups. The number of connections from *.da.uu.net > > that I continue to reject make me think it is an urban legand. :( > > The theory is that that have "opted" to list their dialup lines with > the DUL's DNS server, which can tell if an IP address is assigned to > a dynamic IP address pool. > > The fact is that the majority of dialup address blocks listed in the > DUL are involuntary placement there by third parties. WRONG!!! Please read the web pages again... > If they (or another dialup IP POP provider) _had_ intentionally > opted in (I kind of doubt that EarthLink, for example, intentially > severed the ability of their customers to send email to AOL on a > voluntary basis, what without a relay infrastructure in place at > the time), then they are "filtering port 25 at destinations which > have opted to check the DUL before accepting the SMTP connection". Earthlink opted-in to reduce the mail load on abuse@earthlink, simple economics. -- Rod Grimes - KD7CAX - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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