Date: Wed, 15 Oct 1997 20:51:56 -0500 (CDT) From: igor@alecto.physics.uiuc.edu (Igor Roshchin) To: root@eyelab.psy.msu.edu (Gary Schrock) Cc: don@PartsNow.com, freebsd-stable@FreeBSD.ORG Subject: Re: Anti-spam sendmail in 2.2.5? Message-ID: <199710160151.UAA17669@alecto.physics.uiuc.edu> In-Reply-To: <199710160121.VAA18333@eyelab.psy.msu.edu> from "Gary Schrock" at Oct 15, 97 08:25:07 pm
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Probably, I missing something, but I see a rather logical configuration as follows: 1. There is a list of hosts allowed to send messages through the server in question. Such list can be in sendmail.cf or in a separate file, such as /etc/allowedtorelay, and can include wildcards in order to contain the whole subdomains, e.g. *.domain.com or 128.174.83.* (and/or using IP-mask) (Remark: Limitation to the local host is too strict and not appropriate for many situations, especially if you are using one "postoffice" server as a "smart-host" to relay the e-mail to everywhere outside. 2. Pop-clients : a) If the client is in the same domain than this situation yields 1. b) If the client is coming from any other domain (and not from a fixed list which can be included by a special request to the administrator) e.g. if somebody is using PPP from a personal ISP to read e-mails from the business account, than that ISP should provide mail-server (postoffice, etc.) which shell accept e-mails from any of the PPP/SLIP computers. Hope this helps. IgoR
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