Posted by Jerry Stuckle on 09/18/07 01:47

Sanders Kaufman wrote:
> Jerry Stuckle wrote:
>> Sanders Kaufman wrote:
>
>> MTA's are capable of relaying. But if they are configured correctly
>> they do not, except to intranets. Spammers love those which are
>> configured as open relays. They have lists of them all over the world.
>
> I like the way you wobble back and forth on that.
> It's not a realy - except when it is.
>

Nope, I stand that most public MTA's are not relays.

> And then that slick way you seguay from relays, to open relays - as if
> all relays were open.
>

I never said all relays were open relays. Just that spammers like the
ones out there.

> That last, of course, is why I suggested that the OP use an SSL secured
> mail relay.
>

Which has absolutely no effect on whether the relay is secure or not.
All SSL does is encrypt the data.

>> And POP refers to Post Office Protocol - a protocol for RETRIEVING
>
> Actually, that's just one definition in just one context. In fact, POP
> is an engineering term, not limited to the email, that means
> "Point-of-Presence".
>

When dealing with email POP is not a "Point-of-Presence". Check your
terminology to understand what it means - if you are capable, of course.

> Thus, like I said a Message Transfer Agent that doesn't transfer (relay)
> the messages is just a POP.
>
>

No. Two entirely different things. None of the MTA's are capable of
providing POP services, and none of the POP servers are capable of
handling SMTP traffic.

>
>
>> messages. POP servers by themselves are not capable of receiving
>> email using the SMTP protocol (the one used for sending mail on the
>> internet). You need an MTA to receive the email and deliver it to the
>> POP server.
>
> Hmmm - if only there were an engineering term to describe that "receive
> and deliver" process; a word that engineers have been using since the
> first bucket brigade. Something like "replay" but without the sports
> metaphor?

When an MTA receives a message and places it in a POP (or IMAP) mailbox,
it is called "Delivery", not relay. Relay is used to indicate passing
on to another MTA.


--
==================
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Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
==================

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