Sounds like an opportunity for a small GNATBOX SMTP proxy improvement.
Since it won't/can't store and forward, it should reject the inbound
connection request when it doesn't have connectivity to the internal mail
server.

Dave Morris

On Tue, 15 Jul 2003, Paul Welsh wrote:

> Does anyone know if I can ensure that if our electricy supply goes down and
> back up again, the gb-1000 *doesn't* come back up, either using the gb-1000
> user interface or by configuring a low level model APC UPS?
>
> If you're interested, here's the background:
>
> Every so often we have scheduled power outages, eg, annual testing of the
> building's power supply.  We have another potential one this weekend.
>
> Our gb-100 doesn't have a UPS attached.  In the past, I've either shut it
> down and turned it off or just let it go down and back up with the power.
>
> This weekend, there is only a low probablility of a power outage, so I'm not
> inclined to turn off the gb-1000.  However, if there is a power cut, the
> gb-1000 comes back online and tries to relay mail (we use the mail proxy
> service) to an internal mail server.  If the internal mail server hasn't
> come back online after a graceful UPS shutdown, the gb-1000 tends to bounce
> incoming mail back to the sender, ie, it doesn't do store and forward.
>
> One way around this is to ensure that our mail server *does* come back
> online after a UPS shutdown and I'm working on this.  The other option is to
> prevent the gb-1000 coming back online after a power interruption.
>
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