MTA/Perl script for relaying only to Exchange-users

Chris Stone axisml at
Fri Nov 23 21:17:42 GMT 2012

On Fri, Nov 23, 2012 at 11:28 AM, Peter Bonivart <bonivart at>wrote:

> On Fri, Nov 23, 2012 at 6:16 PM, Chris Stone <axisml at> wrote:
> > milter-ahead is going to be a ton more efficient than any perl based
> script.
> > milter-ahead is written in C, supports caching and numerous indexed or
> flat
> > text file databases for the local cache.
> I assume the script was only used to extract the recipient addresses
> from AD and build the necessary Sendmail files via a cron job so
> performance shouldn't be an issue at all.

But, that would mean though that any changes to accounts on the Exchange
server(s) would not be reflected until the next time the script runs. Using
milter-ahead or smf-sav makes it dynamic rather than static.

I did look at smf-sav and while it worked good, there was a problem that
made it so I decided to license milter-ahead instead - don't recall for
sure, but I think it was that it uses null sender or postmaster as the MAIL
FROM on lookups, whereas, milter-ahead can be configured to use the
original MAIL FROM - which suits my needs better. Probably could add that
support to smf-sav, but since milter-ahead already did it, I went route.


Chris Stone
AxisInternet, Inc.
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