Re: Confusing about Message filter and Content filter
The original message was marked to go to the "Policy" system quarantine via the message filter. However, that message continues through the email pipeline. If no other action affects that message(i.e. dropped by Sophos anti-virus), then the system will move the message to the "Policy" quarantine as originally marked.
However, in your case, the message was marked to be sent to the "Policy" system quarantine, and then it matched your content filter and did two things:
1. spawned a copy of the original message and sent this new one to the "good" system quarantine. (see MID 10698528)
2. the original copy was left alone and this one was sent to the "Policy" quarantine. If you had a drop() action, then it would have gotten dropped and you would have been left with the single copy from #1 (see MID 10698519)
What was the intended behavior you were trying to achieve?
Here are some references that may help:
1. Where can I see a diagram of the IronPort email pipeline?
You can find a diagram of the queue sequence if you click on the Help link in the top right of the web interface - it takes a while for it to load. Find the section "Understanding the Email Pipeline" and then under that "Overview: Email Pipeline".
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Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
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