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Mechanism
Extension to “Via” header


Via: SIP/2.0/UDP biloxi.com;branch=z9hG4bKnashds8
;received=192.0.2.1
;spam=-5
;spam-detail="Hormel-1.0;
whitelist=-10,call_volume=5"
Via: SIP/2.0/UDP sip.atlanta.com;branch=z9hG4bKfjzc
;received=192.0.3.2
;spam=-100
;spam-detail="Jaeger-3.3;not-a-spammer=-100"
Summary score from biloxi.com
Detail from biloxi.com
PPT Version