From owner-freebsd-questions Fri May 9 06:41:22 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id GAA02552 for questions-outgoing; Fri, 9 May 1997 06:41:22 -0700 (PDT) Received: from agora.rdrop.com (root@agora.rdrop.com [199.2.210.241]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id GAA02535; Fri, 9 May 1997 06:41:18 -0700 (PDT) Received: from PEAK.ORG (root@PEAK.ORG [198.68.22.17]) by agora.rdrop.com (8.8.5/8.8.5) with ESMTP id GAA07093; Fri, 9 May 1997 06:10:24 -0700 (PDT) Received: from kira.peak.org (ppp8.nerc.com [205.247.120.192]) by PEAK.ORG (8.8.5/8.6.7) with ESMTP id FAA21211; Fri, 9 May 1997 05:51:53 -0700 (PDT) Received: (from luomat@localhost) by kira.peak.org (8.8.5/8.8.5) id IAA09325; Fri, 9 May 1997 08:51:27 -0400 (EDT) Message-Id: <199705091251.IAA09325@kira.peak.org> Content-Type: text/plain MIME-Version: 1.0 (NeXT Mail 4.1mach v148) X-Image-URL: http://www.nerc.com/~luomat/Timothy_J_Luoma-X-Face.tiff In-Reply-To: <199705090043.RAA29601@hub.freebsd.org> X-Nextstep-Mailer: Mail 4.1mach (Enhance 2.0b5.4) Received: by NeXT.Mailer (1.148) From: "Timothy J. Luoma" Date: Fri, 9 May 97 08:51:25 -0400 To: "Jonathan M. Bresler" Subject: Re: ESCAPE! Florida Cruise/Vacation $598/4 People cc: freebsd-questions@FreeBSD.org Reply-To: luomat@peak.org References: <199705090043.RAA29601@hub.freebsd.org> Organization: Princeton Theological Seminary X-Url: http://www.peak.org/~luomat/ X-NeXTStep-Url: http://www.peak.org/~luomat/next X-PGP-Key: Email me Sender: owner-questions@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk Responding To: "Jonathan M. Bresler" Original Date: Thu, 8 May 1997 17:43:33 -0700 (PDT) Message-ID: <199705090043.RAA29601@hub.freebsd.org> > we have considered only accepting mail from those that are already > subscribed...this means from the address that they used to > subscribe...a number of people have more thatn 1 email address > this wouldforce them to always use the same address when sending > mail to the list. and god help those whose mail is forwarded A number of lists I am on already do this. I have different accounts, but if I want to post to the group from one of them I sign up and turn off the option to receive the messages from the group on that account. Also: how about checking that the list is mentioned in either the To or Cc line? Yes I know that that will prevent people from Bcc'ing the list, but who cares? Also: how about checking that there is a valid domainname in the 'from'? # whois FL-CRUISE.com No match for "FL-CRUISE.COM". (I believe that the latest sendmail can do this) You can also do, as someone else suggested, keyword checking on email from first-time posters, assuming that each spammer will only try once from each account or name? Yes I know that even these suggestions aren't perfect -- however together they form a pretty good first line of defense... TjL -- TjL http://www.peak.org/~luomat/next/ Links to all things NeXTStep/OpenStep! Info, pictures, Ftp sites, FAQs and more.