2RFC 7208, "Sender Policy Framework (SPF) for Authorizing Use of Domains in Email, Version 1", April 2014
3Source of RFC: spfbis (app)
4See Also: RFC 7208 w/ inline errata
9Publication Format(s) : TEXT
10Reported By: Peter Occil
11Date Reported: 2018-07-23
12Verifier Name: Alexey Melnikov
13Date Verified: 2018-11-26
15Throughout the document, when it says:
17 header-field = "Received-SPF:" [CFWS] result FWS [comment FWS]
18 [ key-value-list ] CRLF
21 header-field = "Received-SPF:" [CFWS] result [ FWS comment ]
22 [ FWS key-value-list ] [FWS] CRLF
26As 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.