Definately worth the effort: Making sendmail only accept mail to genuine Exchange users

[Martin Hepworth]

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John

heck even more than mine - I drop 66% of inbound email at the MTA due to 
it being for non-existant users..

--
Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300


John P. Lang wrote:
> This has made all the difference in the world!  We scan mail for 4 
> domains (3 exchange servers and local mailboxes)
> 
> We were processing over 2700 pieces of mail per day.  The majority of it 
> was dictionary style spews.
> 
>  
> 
> This simple change dropped us down to only processing about 300 pieces 
> of mail through Mail Scanner.  The reject graph went through the roof in 
> MailWatch.
> 
> Whoever wrote that FAQ entry deserves a huge pat on the back!  Thanks.
> 
>  
> 
> We did have to modify the configs a bit, as we send to the 3 different 
> exchange servers plus localhost.  It was pretty easy though.  I just 
> pipe the text files into a mysql database using PHP,
> 
>  
> 
> The table has
> 
> Emailaddress    FQDN of exchange
> 
> fred at domain1.com <mailto:fred at domain1.com>        mail.domain1.com
> 
> joe at domain2.com <mailto:joe at domain2.com>         mail.domain2.com         
> 
> me at localdomain.com <mailto:me at localdomain.com>    localhost
> 
>  
> 
>  
> 
> I then output this via PHP again to the whitelist-address.txt file -> to 
> the mailhost.db for sendmail to use.
> 
>  
> 
> Thanks again for the tutorial and THANKS for MailScanner^Å.
> 
>  
> 
> BTW, the book is great!
> 
>  
> 
> John
> 
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