Thomas Jacob wrote:
does the RFC set a limit on the number of SPF mechanism a record
may contain? Libspf2 seems be setting this to 10
The 4408 limit is 10 counting only the mechanisms (and redirect=)
causing a DNS lookup (e.g. "a", but not "ip4" or "all"). That's a
global limit (over any include: or redirect=), no per record limit.
Of course a single record containing 11 counted mechanisms is also
invalid: "v=spf1 a a a a a a a a a a a ?all" is bad (11 As), and
x.example IN SPF "v=spf1 redirect=x.example" is also bad (INF > 10).
Frank
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