[Mimedefang] Whitelisting Outbound E-Mail Addresses

[Richard Whelan]

Hi Wrolf,

I don't suppose you could share the code you have used to do this. It 
sounds very similar to something I have tried to do, and for the same 
reasons, the DNSBL lists are sometimes too aggressive. My perl is pretty 
weak, and although I'm managing to add domains, like you to the 
access.db file, I feel I could go about it in a better way.

Cheers,

Richard

>
>
>For a long time now (before implementing MIMEDefang) I have implemented
>site-wide whitelisting of the to address of any outbound e-mail.
>
>It is reasonable to assume that if one of my users sends someone mail, then
>they want a reply.
>
>Since my users are a community of interest (corporation), it is also quite
>likely that someone else here would want e-mails from that person.
>
>I implemented this using the access.db feature of Sendmail, with scripts
>every five minutes scanning the logs and adding new entries.  It really got
>around the problem of overly aggressive DNSBLs - I used to get into
>explaining what a DNSBL (RBL) is to administrators at our customers and
>suppliers, had to manually whitelist their server, etc.
>
>Users very rarely call me over this now, since if they fail to get an
>initial e -mail sent to them from a customer, they first try sending one
>out.  This is a good strategy anyway (customer may have typoed their
>address, etc.)
>
>I would love to see this integrated into MIMEDefang.
>
>Wrolf
>
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>
>  
>

-- 
Richard Whelan
Senior Systems Administrator
PIPEX

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