That's just it - if your sales guy is at hotel with his laptop, he could use AUTH/STARTTLS and actually relay through his company's mail server. Thus the email from [EMAIL PROTECTED] would be delivered by mail.acmewidgets.com to where it needed to go... SPF would be valid. This no bounce at the destination.
You try and tell that to thousands of customers. Who had their laptops set up in 1997 by a company that has long gone bankrupt. And will sue you if suddenly their email isnt working anymore :)
Welcome to the world of ISPs :)
I was speaking in the terms of a corporate user which should have an IT department. <Tongue in Cheek>
But seriously, it's so easy to set up StartTLS on the client side...
That's what an ISP's FAQ/Techsupport Page is for, right!?!
-Ben
p.s. Seriously, STARTTLS/AUTH is really easy to set up on the client side.
It's either going to be conform or be blocked. (sigh) I hear you guys. Not gonna be pretty.
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