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Received Header




Received Header
The service includes a “Received” header into each message processed. This information includes the IP address of the sender, any details on TLS (Transaction Layer Security, an optional feature) secure transmission from the sending server, the particular server which processes the message, and a timestamp.
An email message that passed through the email protection service will have a header similar to:
Received: from source ([12.158.40.254]) by exprodNmxM.postini.com
([64.18.X.Y]) with SMTP; 	Wed, 08 Jan 2007 12:47:24 PST
If you don’t see a header with the domain similar to exprodNmxM.postini.com (for example, exprod8mx8.postini.com), the message did not go through the email protection service, and was delivered directly to the recipient’s server.
TLS delivery from the sending server to the email protection service is indicated by “using TLSv1” or “using SSLv3”, for example:
Received: from source ([12.158.40.254]) (using TLSv1) by
exprodNmxM.postini.com; 	Wed, 08 Jan 2007 14:39:55 PST
 
Received: from source ([12.158.40.254]) (using SSLv3) by
exprodNmxM.postini.com; 	Wed, 08 Jan 2007 15:02:31 PST
 
(Your mail server may add similar details to the header to indicate that the message was received via TLS from the email protection service.)


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