[Asrg] On assertions

[Frank Ellermann]

"der Mouse" wrote:

> I'm not quite sure the implication is valid

IIRC 2821bis + 2822upd expect that addresses are 
usable, e.g., for NDRs and ordinary mail replies. 

A somewhat grey area with lots of RFC lawyering,
but simplified, "if it can't receive no mail it
has no business to send mail."  AFAIK the RFCs
*allow* this interpretation, and arguably it's
a bit more than only "allow".

 Frank