Date: Fri, 24 Oct 1997 19:11:34 -0700 (PDT) From: Dan Busarow <dan@dpcsys.com> To: Terry Lambert <tlambert@primenet.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Anti-spam in hub.mc Message-ID: <Pine.UW2.3.95.971024182721.12845A-100000@cedb> In-Reply-To: <199710250116.SAA10298@usr08.primenet.com>
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On Sat, 25 Oct 1997, Terry Lambert wrote: > > >> My question is how will they actually contact the postmaster if mail > > >> from that site is blocked????? > > > This is actually required, unconditionally, even if you are blocking > other mail from that site. What was that RFC number? I do have a postmater mailbox and it is usable by 99.9995% of the Internet. (rough estimate) I see nothing in in RFC1123 that says I MUST accept mail to postmaster from every host on the Net, just that my MTA MUST support the postmaster mailbox, which it does, filters and all. Requiring postmaster to go through would also rule out check_mail filters which are certainly allowed by the RFCs. (quoting RFC821) "*if accepted*, the receiver-SMTP returns a 250 OK reply." Emphasis mine. RFC lawyering aside, care to share the IOS filter that checks for recipient if the packet is for port 25 but from a blocked source address? Dan -- Dan Busarow 714 443 4172 DPC Systems / Beach.Net dan@dpcsys.com Dana Point, California 83 09 EF 59 E0 11 89 B4 8D 09 DB FD E1 DD 0C 82
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