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Email protection - Disconnect delivery target for a amount of time

Hello,

We would like to use SPAM protection in our environment. Our Sophos SG-210 accepts 3 email domains and redirect emails from these domains to a host which is an Exchange server.

Sometimes it happens that we do a maintenance on our Exchange server. During this time, I would like to suspend the delivery of our emails from the Sophos SG-210 to this Exchange server and I would like that emails stay in spool until our maintenance is finished.

Is there a way to do this? How can I set to stop delivery to Exchange server and spool the emails?

The only way I found so far is to close the network connectivity between our Sophos SG-210 and the Exchange server but I don't like this solution...

I tried with a firewall rule which I activate during the maintenance:
FROM: Any -> Protocols: Any -> To: Exchange server
But unfortunately the Sophos SG-210 is delivering mails. I guess that SMTP proxy is ahead firewall rules.

Can you help me?

Regards,

DeltaSM

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0 Scott_Klassen over 9 years ago

The options are to sever connectivity or to change the routing. If you have route by set to Static Host List, you can edit the host definition to temporarily point to a non-existent address. Then the UTM will store and retry mails for up to 72 hours.

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0 DeltaSM over 9 years ago

What do you mean by "server connectivity"?

By routing, you will say that I can forward emails through Static Host list to a "temporary" mail server which in fact doesn't exists and point to anything? Thanks to this, emails couldn't be delivered and then cached into the Sophos SG-210 retention?

Thanks again for this answer.
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0 Scott_Klassen over 9 years ago

What do you mean by "server connectivity"?
As you mentioned in the original post, close the network connectivity to the Exchange server by unplugging the ethernet cable, disabling the network adapter, or closing the switch port it is connected to.

By routing, you will say that I can forward emails through Static Host list to a "temporary" mail server which in fact doesn't exists and point to anything? Thanks to this, emails couldn't be delivered and then cached into the Sophos SG-210 retention?
Correct.

__________________
ACE v8/SCA v9.3

...still have a v5 install disk in a box somewhere.

http://xkcd.com
http://www.tedgoff.com/mb
http://www.projectcartoon.com/cartoon/1
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0 DeltaSM over 9 years ago in reply to Scott_Klassen

As you mentioned in the original post, close the network connectivity to the Exchange server by unplugging the ethernet cable, disabling the network adapter, or closing the switch port it is connected to.

Problem is that we need network sometimes. Fortunately I tried the second solution and it works and does the trick.

Thanks again!
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0 Scott_Klassen over 9 years ago

No problem. Happy to oblige.

__________________
ACE v8/SCA v9.3

...still have a v5 install disk in a box somewhere.

http://xkcd.com
http://www.tedgoff.com/mb
http://www.projectcartoon.com/cartoon/1
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