> For instance, you might have domain_overrides as a DB file of some kind,
> keyed by domain and with the data being a space-separated list of
> key="value" items, such as:
>   DB-Key:   msn.com
>   DB-Value: max_rcpt=20 foo=bar
> 
>   DB-Key:   example.com
>   DB-Value: tls=y

    psg.com:/usr/local/etc/exim# cat ro.smtp
    earthlink.com           max_rcpt=20
    unstable.nl             port=2525

and

    /usr/local/sbin/exim_dbmbuild $EDIR/ro.smtp $EDIR/ro.smtp.db
    chmod 644 $EDIR/ro.smtp.db
    chown majordom $EDIR/ro.smtp.db

was run

> Then the Router would have:
>   transport = smart_smtp
>   address_data = 
> ${lookup{$domain}partial()cdb*{/path/to/domain_overrides.cdb}}

    db_smtp:
      driver = dnslookup
      transport = smart_smtp
      address_data = ${lookup{$domain}dbm{/usr/local/etc/exim/ro.smtp.db}}

> and the Transport would be:
> 
> smart_smtp:
>   driver = smtp
>   hosts_require_tls = ${extract{tls}{$address_data}{*}{}}
>   tls_verify_certificates = ${extract{tls}{$address_data}{/etc/ssl/certs}{}}
>   max_rcpt = ${extract{max_rcpt}{$address_data}{$value}{100}}

    # special smtp driven from database
    smart_smtp:
      driver = smtp
      hosts_require_tls = ${extract{tls}{$address_data}{*}{}}
      tls_verify_certificates = ${extract{tls}{$address_data}{/etc/ssl/certs}{}}
      max_rcpt = ${extract{max_rcpt}{$address_data}{$value}{100}}
      port = ${extract{port}{$address_data}{$value}{25}}

but then, to test

    psg.com:/usr/local/etc/exim# exim -bt
    2010-09-02 03:20:19 Exim configuration error in line 779 of 
/usr/local/etc/exim/configure:
      integer expected for max_rcpt

that's in the smart_smtp transport

randy

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