[ietf-dkim] Re: over-the-wire (in)compatibility between pre-IETF DKIM and (eventual) IETF DKIM

[Frank Ellermann]

Dave Crocker wrote:

> We should make sure that there is a reasonably clear view of
> priorities for preservering installed base... or not.

My idea would be "like TLS and SSL":  A future "IETF checker"
must handle valid "legacy signatures", but a "legacy checker"
might be unable to handle all valid future "IETF signatures".

Isn't that obvious ?  Otherwise all DKIM milestones could be
reduced to "publish DKIM as is next week and be done with it".

                            Bye, Frank