How to disable SMTP proxy filtering on GREEN only?

[Guest]

[S3@N]

Forgive me if this is a stupid question.

We have Endian 2.5.1 set up to filter our inbound mail via the SMTP proxy before relaying to Exchange.  Our outbound mail is also going through the proxy on GREEN as we want to have a single external interface (on RED).  So we want all the filtering on inbound mail but none on outbound.  What is the best way to achieve this?

I have use the SMTP proxy white lists to ensure that mail from our Exchange server is accepted and white listed for spam and virus checks - I have white listed our domain and Exchange server when necessary.  However I am still seeing occasional outbound mail being caught by our spam filter !?!

I want all outbound mail to look as though its coming from our external interface (matches our mx and SPF records), but not to be filtered in any way by Endian...

Any pointers greatfully received...

Thanks!