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Date:      Mon, 14 Feb 2000 16:15:03 -0500
From:      Mitch Collinsworth <mkc@Graphics.Cornell.EDU>
To:        Nella White <nella@red.asis.com>
Cc:        isp@FreeBSD.ORG
Subject:   Re: sendmail and spam prevention procedures 
Message-ID:  <200002142115.QAA54867@benge.graphics.cornell.edu>
In-Reply-To: Message from Nella White <nella@red.asis.com>  of "Mon, 14 Feb 2000 12:40:11 PST." <Pine.BSF.4.10.10002141209020.15427-100000@red.asis.com> 

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>Hi - I am using both Ipass Global Roaming network and a wholesaler of
>dialup access. These IPs need to be able to send mail through us, though I
>don't want to enable promiscuous relaying in Sendmail. I'd appreciate any
>suggestions about how to accomplish this. I have a file of IPs from my
>wholesaler that can be used to relay selectively, but despite reading the
>Sendmail docs, I don't know how to add the Sendmail rules for this.

You can put allowed domain names or ip addresses in [] in
/etc/mail/relay-domains.


>Ipass suggests using "POP before SMTP" to give the roamers' IPs temporary
>access to send mail. I'd appreciate pointers to how to accomplish this as
>well.

http://spam.abuse.net/tools/smPbS.html
http://www.cynic.net/~cjs/computer/sendmail/poprelay.html

-Mitch


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