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Re: iesg comment re message submission in draft-ietf-grip-isp-expectations-03.txt
At 09.45 -0700 00-05-30, Randall Gellens wrote:
>In addition, to facilitate the enforcement of security policy, it is
>strongly recommended that messages be submitted using the MAIL
>SUBMIT port (587) as discussed in "Message Submission" [RFC2476],
>rather than through the SMTP port (25). In this way the SMTP port
>(25) can be restricted to local delivery only.
>The reason for this is to be able to differentiate between inbound
>local delivery and relay (i.e., allow customers to send email via
>the ISP's SMTP service to arbitrary receivers on the Internet).
>Non-authenticated SMTP should only be allowed for local delivery.
What I don't understand is what you win by separating this on two
different port numbers.
Can you explain?
Part from this, the suggested text is ok.