#94 cosydeliver confused by "inside" from address

[John Ralls]

If a user sends mail from the outside using an "inside" email address,
tcosy-deliver will assume that 1) the email is already on the system
and therefore doesn't need to be copied in and 2) that the messageid
provided by the outside mailer refers to a valid message inside and will
use that id in the Memo_in file. It would also be a good thing to
update the senders Memo_out file -- though if the user is relying on
an outside mailer (with forwarding) this won't really matter. There
needs to be authentication to prevent spammers from using this as
an end-around the "no outside mail" flag.