inbound email filter/spam

Is there anyway you can think of within exchange, outlook, or message headers that may give clues what appliance/software is scanning inbound email for malware/spam? our partner orgnisation have inherited an exchange environment with zero documentation about the setup, and are trying to think of a way to try and determine what appliance is filtering inbound email.. any ideas where to start if the appliance is unknown, could mail headers give any clues?

or would there be anywhere within exchnage itself to see what appliance handles and filters inbound mail before it hits the exchange mailbox server/database(s).
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pma111Asked:
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Patrick BogersConnect With a Mentor Datacenter platform engineer LindowsCommented:
Hi

Yes, in the mail headers you follow the email end to end. This way we can see all our mail being scanned by Barracuda systems.
If, for example, GFI softwarespam software is installed it doesnt show in the headers, only if the mail has been handled on a physical location.
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