The default action will be to accept mail, if one of the rbl servers goes
down.

If you have a high-enough mail volume you can sign Vix' indemnification
agreement and they'll let you stealth-zone xfer the rbl zone so you can
query your local server.  This makes a huge speed difference if you do
large volumes of mail.

You can also subscribe via BGP, if you have anything that speaks it.

Adam Maloney
Systems Administrator
Sihope Communications

On Mon, 6 Nov 2000 dopp at acm.cs.umn.edu wrote:

> Ok, I want to set up real-time blackholing on a mail server running
> sendmail 8.9.3.  My major concern is what will happen if one of the lookup
> hosts (e.g. rbl.maps.vix.com) suddenly becomes unavailable (either because
> our network goes down, or the lookup host goes down).  Does anyone know?
> Will it time out (good) or will my server stop delivering mail until it can
> see the lookup host again (bad)?  I couldn't find any info either way and I
> don't feel like parsing the code at the moment :)  Any info would be
> greatly appreciated.
> 
> TIA,
> 
> Gabe
> 
> -- 
> --------------------------------------------------------------------------------
> Gabe Turner				       |  	   X-President,
> UNIX Systems Administrator,		       | Assoc. for Computing Machinery
> U of M Supercomputing Institute for	       |    Univerisity of Minnesota
> Digital Simulation and Advanced Computation    |       dopp at acm.cs.umn.edu
> 
> "I've been known to lie, but this here's a true story."
> 					- Narrator in "Big House Blues"
> --------------------------------------------------------------------------------
> 
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