Lloyd Zusman writes:
I want to make sure that I understand how the 'sender' and 'receiver' attributes get set within the three kinds of Received-SPF headers that Courier can generate. Is the following information correct?
HELO Received-SPF sender: value of helo/ehlo field receiver: hostname of machine on which Courier is running
MAILFROM Received-SPF sender: envelope sender (SMTP "mail from:" value) receiver: hostname of machine on which Courier is running
FROM Received-SPF sender: value of "From:" email header receiver: hostname of machine on which Courier is running
If so, I take it that the 'receiver' attribute will always be set to the same value on a given host, no matter which Received-SPF header it appears in, and no matter which SPF-related conditions might be in effect. Correct?
Yes; however note that Courier will leave any existing Received-SPF: headers, perhaps inserted by the previous mail relay, untouched (except that they will be moved to the end of the existing headers, so that Courier's headers always come first). And, the previous relay can easily be configured to use the same hostname.
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