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Date:      Thu, 6 Jan 2000 18:32:06 +0100
From:      Brad Knowles <blk@skynet.be>
To:        "Will Mitayai Keeso Rowe" <mitayai@bricsnet.com>, "David Wolfskill" <dhw@whistle.com>, <freebsd-stable@FreeBSD.ORG>
Subject:   RE: Sendmail, 3.3-STABLE, relaying
Message-ID:  <v0422081db49a81bd469b@[195.238.1.121]>
In-Reply-To: <NDBBIBPPALJNCAALNFFAIEFMCGAA.mitayai@bricsnet.com>
References:  <NDBBIBPPALJNCAALNFFAIEFMCGAA.mitayai@bricsnet.com>

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At 11:48 AM -0500 2000/1/6, Will Mitayai Keeso Rowe wrote:

>  i want IPs resolving reversely as *.company.com to be able to relay through
>  that host.

	Keep in mind that any spammer that owns his own reverse DNS 
(which is not uncommon) can claim to be fred.company.com, and you 
would allow him to relay through your server.

	I strongly suggest that you allow the ability to relay *purely* 
by IP address, and if you wish to prevent anyone from being able to 
send you mail (by using the REJECT option), do that by hostname, 
envelope sender address, or IP address.

-- 
   These are my opinions -- not to be taken as official Skynet policy
  ____________________________________________________________________
|o| Brad Knowles, <blk@skynet.be>            Belgacom Skynet NV/SA |o|
|o| Systems Architect, News & FTP Admin      Rue Col. Bourg, 124   |o|
|o| Phone/Fax: +32-2-706.11.11/12.49         B-1140 Brussels       |o|
|o| http://www.skynet.be                     Belgium               |o|
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
  Unix is like a wigwam -- no Gates, no Windows, and an Apache inside.
   Unix is very user-friendly.  It's just picky who its friends are.


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