Inbound vs Outbound (and integration with Vontu DLP)
Updated: 07 Nov 2011 | 3 comments
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Hi all.
Quick question for my own sanity - what ultimately determines whether the message is going inbound or outbound?
Is it the choice of the network interface that the message is accepted on? (my Brightmail scanners have two NICs)
Or is it based on whether the message's destination domain name is listed among local domains?
As for Vontu DLP integration - is there any way to trick it into scanning Inbound messages as well as Outbound?
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It depends
If you provision different IP addresses for inbound vs outbound, it will use the IP address that the message is accepted on. If you use the same IP address, it will base this decision off the hosts you've identified as able to send outbound mail.
I have two IPs. So if I
I have two IPs.
So if I pipe all the traffic via the "otbound" interface, then it will all go through the Vontu DLP...
But on the other hand I guess all my compliance rules will get screwed up that are based on "Inbound" vs "Outbound" conditions.
Oh, and my relay permissions are going to get messed up too... Currently we have a specific list of hosts that are allowed to relay outbound mail.
Two IP's
Hi Andrey,
Keep in mind it's not really possible to pipe all traffic through the interface, the Outbound IP will only accept connections from hosts that are defined under the 'Accept outbound mail connections from the following IP addresses and domains:' setting on the Outbound SMTP settings page.
Cheers,
Kevin
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