Matus UHLAR - fantomas writes:
I'm fine with Received-SPF being renamed when mail is received from untrusted host. But for mail received from our (trusted) mail backups: - the SPF check will apparently fail (thus I better turn if off) - I could trust the SPF headers made by them, but they get renamed to Old-I think the SPF check done by courier doesn't care if the mail is received from mail backup of recipient's domain. (This could be problem for multiple recipients).
Correct. A mail gets received from some IP address. The IP address does not get to wear a name badge that says "I am trusted".
The renaming of Received-SPF: only happens when SPF checking is used. If BOFHSPFHELO, BOFHSPFMAILFROM and BOFHSPFFROM are set to "off", it should not get renamed. Therefore, if you enable SPF checking on all your incoming mail servers, and if they forward their mail to internal end-delivery hosts which are not configured to use SPF checking, then the Received-SPF: headers inserted by the receiving servers should rename intact.
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