Re: [exim4] mixed up about terminology
On Mon 06 Oct 2014 at 09:04:14 -0400, Jerry Stuckle wrote:
> On 10/5/2014 11:31 PM, Chris Bannister wrote:
> >
> > Good point. Just to be pedantic all MTAs act as relays, but I think the
> > term being talked about is "open relay" IOW it's "open" for anybody to
> > use, spammers, guy next door etc. etc.
>
> One correction - all MTAs *CAN* act as relays. But sending a message
> from the sender's MTA to the recipient's MTA is generally not considered
> "relaying". A relay would be when there is a third (or fourth or
> fifth...) MTA between the sender's and recipient's.
This has prompts one to consider at what point in a ten person relay
race could "relaying" be regarded as starting.
> Only under special conditions would a relay be required. The most
> obvious one I can think of is a large company with multiple sites; all
> mail would go to ???@example.com, which would be one MTA. But this MTA
> would then relay messages to MTAs at local sites around the world. And
> the reverse would happen for messages being sent by employees.
All the OP wants to do is set up a smarthost for clients on his home
network. Now he's informed it doesn't meet the "special conditions"
criterion.
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