Alexey Melnikov wrote: > nothing prevents the final SMTP server from passing commands > to the LMTP server, before replying to the SMTP client. Thanks for info, I wasn't aware of that possibility. Maybe it is unnecessary to have the LMTP reference as "normative", but based on your info I agree that a "downref" is no issue. Frank _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf