Re: SMTP relays with Postfix and LDAP
On Thu, Apr 19, 2001 at 01:52:42PM +0200, Russell Coker wrote:
> I want to have some mail servers running Postfix which look at LDAP to
> determine whether they should run as a secondary MX for mail domains.
>
> Does anyone know how to do this?
dunno if it's possible to do that from LDAP directly, but it should
be possible to generate a hash or dbm or whatever map file for the
relay domains. generate it from a cron job, or whenever the LDAP db is
updated.
that would be a lot faster than LDAP lookups, too.
alternatively, just set permit_mx_backup in smtpd_recipient_restrictions.
that allows relaying for any domain which lists you as an MX. there is
some potential for unauthorised use of this feature, but it's basically
self-limiting and self-correcting as a mail admin can easily route such
mail to /dev/null.
IMO and IME, the amount of time spent maintaining a relay domains
list is far greater than the amount of time spent dealing with rare
unauthorised MX listings.
craig
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craig sanders <cas@taz.net.au>
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