> In general anything coming into your mailbox and having a To: field
> that is not one of your addresses should be dropped as spam.

That prevents delivery of valid CC (carbon copy) and BCC (blind
carbon copies).  I, for one, use both of those addressing forms.

> The envelope address (the To: field) and the real delivery address
> (smtp protocol 'rcpt to:' line argument) are different in email 
> (unfortunately).

This is just like paper mail.  The envelope address does not have
to have any relationship to the contents ... as it should be.
People seem to be able to deal with this with paper mail.

> While this 'feature' makes running mailing lists easier, it also makes 
> 90% of spam email possible.

That's plain wrong.  The delivery mechanism already has to make
individual connections to the recipient's system and enumerate
the recipient's name in the envelope portion of the SMTP dialog.
If the recipient's name had to be in the To: line, it would just
require more storage by expanding the header portion.

						Lee Jones

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