whitelisting by connection tracking

Steve Swaney Steve.Swaney at FSL.COM
Thu Nov 18 21:35:49 GMT 2004

> -----Original Message-----
> From: MailScanner mailing list [mailto:MAILSCANNER at JISCMAIL.AC.UK] On
> Behalf Of paddy
> Sent: Thursday, November 18, 2004 4:07 PM
> Subject: whitelisting by connection tracking
> Hi,
> I've been asked to implement a specific feature:
>   When we relay outgoing mail for a client we are to track the recipients
>   and then, essentially, whitelist those recipients for return mail.
> This seems like a reasonable and simple idea, and yet I'm having trouble
> tracking down any other mention of it.  I figure this indicates some or
> all of the following
> 1. I'm not looking very hard (okay, true ...)
> 2. It's a deeply flawed idea
> ... you get the idea.
> So if anyone can point me at existing implementations of this kind of
> thing
> or cares to point out complexities I may yet have overlooked, I'd be
> overjoyed.

If you're using sendmail, you might look at milter-sender. It's pretty
configurable and I think you might be able to turn off all of the blocking
features except:

# White list recipients of a local sender for future replies.


At least it maight be a start :)

Steve Swaney
Fortress Systems Ltd.
steve.swaney at fsl.com

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