johnc-lists(_at_)cleburne(_dot_)com writes:
<snip>
Is it correct for ISPs to ban their users from using an authenticated
SMPT server outside of their network?
Absolutely, YES!
OK, but authenticated SMTP is still a part of what makes SPF possible.
As the FAQ says it:
If you are the customer of an ISP that publishes SPF records, your
ISP should provide you with an SMTP server that you can authenticate
to, using either POP-before-SMTP or SASL AUTH. Or you can ask them
to exclude you from SPF using the a user-specific "exists"
mechanism.
This is what you want to block.
I _must_ be able to send e-mail with my company address when at home,
without having to use VPN. I can hardly imagine that I am alone.
--
Gustav Foseid, Initio IT-løsninger AS
http://www.initio.no/
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