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RFC 7208, "Sender Policy Framework (SPF) for Authorizing Use of Domains in Email, Version 1", April 2014

Source of RFC: spfbis (app)
See Also: RFC 7208 w/ inline errata

Errata ID: 5436
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Peter Occil
Date Reported: 2018-07-23
Verifier Name: Alexey Melnikov
Date Verified: 2018-11-26

Throughout the document, when it says: 

    header-field     = "Received-SPF:" [CFWS] result FWS [comment FWS]
                       [ key-value-list ] CRLF

It should say:

    header-field     = "Received-SPF:" [CFWS] result [ FWS comment ]
                       [ FWS key-value-list ] [FWS] CRLF

Notes:

As specified, this ABNF doesn't allow a header field value like result-FWS-comment with no FWS or key-value-list following it, a header field value which occurs very often in Received-SPF header fields I see in practice. (Note that FWS must contain at least one white space.) The corrected ABNF better follows practice in implementations.

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