Thanks Carsten, and I think you are right. (I was also suffering from the same issue, so I was only able to verify the ABNF by removing the RFC 7405 syntax, hence didn’t catch this. Of course I should have paid more attention when writing it, though. RFC 7405 is clear that there’s no whitespace.) Jari -- last-call mailing list last-call@xxxxxxxx https://www.ietf.org/mailman/listinfo/last-call