spf-discuss
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RE: [spf-discuss] Forwarder whitelisting reloaded

2008-01-15 17:45:25
On Thu, 10 Jan 2008, David MacQuigg wrote:
I wish we had a shared terminology for the various entities in an
exchange.  From this and other recent discussions on this list, I'm trying

Actually we do already have a vocabulary.

The relay at the sender's border is called a "smarthost".

The relay at the recipient's border is called an "MX".

There's no term for the possibly-multiple relays that constitute a
forwarder. However, we can generally treat the forwarder as a black box,
and just use the term "Forwarder" to refer to the whole thing.

Sender --> Relay --> /Border/ --> Forwarder(s) --> Receiver --> Recipient

Normal case:
Sender --> Smarthost ==> MX --> Recipient

Forwarding case:
Sender --> Smarthost ==> Forwarder ==> MX --> Recipient

Where "==>" denotes a border-crossing hop.

---- Michael Deutschmann <michael(_at_)talamasca(_dot_)ocis(_dot_)net>

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