>As long as I was on Earthlink dial up I never had to use smtpauth but when 
>I upgraded to earthlink DSL service,  smtp without auth would not work so 
>I had to download and use Chris' revised Emailer.  It has worked just fine 
>with 10.3.9 but I have not upgraded to 10.4.x so I can't attest to that 
>combination.  Their DSL may be different in different locations.

Earthlink owns (or at least owned) a HUGE dialup network. They used to 
sublease it to other providers it was so big.

Earthlink DSL works like all other DSL, there are only a handful of "last 
mile" providers, everyone else (including Earthlink) subleases from them.

What does that mean? That means Earthlink had control over who was on 
their dialup network and what IP addresses were used. But when it comes 
to DSL, they have no real way of knowing who is using which IP addresses 
(at least no easy way), so they won't IP Authenticate for DSL because too 
many of the IPs will be shared among multiple ISPs.

Of course, PPPoE was supposed to provide a way to know this stuff, but 
SMTP Auth is just easier to impliment then trying to tie into the PPPoE 
database.

-chris
<http://www.mythtech.net>

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