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Date:      Sun, 03 May 1998 20:50:33 +0100
From:      Manar Hussain <manar@ivision.co.uk>
To:        "freebsd-isp@FreeBSD.ORG" <freebsd-isp@FreeBSD.ORG>
Subject:   Re: SMTP vs Spam
Message-ID:  <3.0.5.32.19980503205033.00923890@stingray.ivision.co.uk>
In-Reply-To: <Pine.BSF.3.96.980503121709.28140A-100000@altrox.atipa.com>
References:  <3.0.5.32.19980502210212.008f63f0@stingray.ivision.co.uk>

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At 12:18 03/05/98 -0600, Atipa wrote:
>Install your smtp w/ tcp wrappers or xinetd, so that it will only relay
>for allowed hosts. Works fine for me, using both IMAP and POP. I use qmail
>for smtp and sendmail and local delivery, and it works great.

Err - great.

The difficulty is when you want to let a customer who you host a
domain/web/mail for to be able to send mail via you (their ISP may block
mails with from lines of their domain that you host) and where this
customer uses dial-up and gets a different IP address each time.

Being able to dynamically add to a list of machines allowed to relay based
on those hosts that make a successful pop connection is the neat idea. Then
restricting mail relaying to such a list is the easy bit ...

Manar

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