In article <alpine.lsu.2.00.1602291256220.11...@hermes-2.csi.cam.ac.uk> you write: >Suresh Ramasubramanian <ops.li...@gmail.com> wrote: > >> A domain with a null mx may well originate email >If they try to do that they will be sad.
RFC 7505 section 4.2 agrees with you. Section 4.1 suggests using status code 550 and extended code 5.7.27 when you reject it. It took more coordination than you might expect to make this match Klensin's RFC 7404 which defines the new status codes for null MX rejections. R's, John _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
