Re: [ietf-smtp] loop homework, not an experiment, draft-crocker-email-de

> > When mail systems do internal forwards using things like .forward or
> > /etc/alias, each forward adds a Delivered-To, which breaks a->b->c->a
> > loops.  Since there's no SMTP involved, there's usually no Received and
> > never an Envelope-To.  Also, as Sam, Viktor, and I have explained, the
> > internal forwards are not necessarily to or from anything that has an
> > externally valid envelope address.
> What happens when there are multiple recipients? Message splitting?
For Delivered-To loop breaking it doesn't matter since it's just a token 
to show that the message has already been wherever it is.
I believe that Exim does one delivery at a time so its Envelope-To only 
has one address.  I can ask Jeremy what happens with multiple recipient 
messages.
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

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