Re: AD review comments on

> Noting when a message makes it to the recipient, rather than merely being
> deposited into the recipient's mailbox, is the key conceptual point.

so when the fax recipient reads the piece of paper, do we call that delivery?
no.  we call that reading the fax.

> Note that POP is a DELIVERY protocol, not an access protocol. 

rubbish.  POP was intended for retrieval of already-delivered messages.

Keith