nanog mailing list archives
Re: How do you stop outgoing spam?
From: Dave Crocker <dhc2 () dcrocker net>
Date: Tue, 17 Sep 2002 20:29:39 -0700
At 02:11 PM 9/16/2002 -0400, Greg A. Woods wrote:
> 2. The issue with email is authentication, not privacy. Authentication can > be achieved can be achieved easily over port 25, without encryption. Well, no, not securely it can't. You cannot have a secure authenticated service running over a raw TCP circuit across public networks.
1. You are adding to the requirement. No matter how reasonable or advisable, encryption (privacy) is a separate function from authentication. And the rationale for doing port 25 port blocking has to do with accountability, not privacy.
2. Just so there is no confusion, I meant encryption as in privacy (content encryption) rather than as part of an authentication mechanism.
3. SMTPAUTH does not require an alternate port, yet it is sufficient for ensuring accountability. Hence it is sufficient for dealing with the reason that port 25 is blocked, without requiring that it be blocked.
> Hence, blocking port 25 blocks legitimately validated email, > as well as possible spam. Well, yes, but obviously that doesn't matter. This is the real world Dave.
Thanks for noticing that. That is why I keep citing the impact on real, mobile users and the implication for such minor opportunities such as wireless hotspots.
d/ ---------- Dave Crocker <mailto:dave () tribalwise com> TribalWise, Inc. <http://www.tribalwise.com> tel +1.408.246.8253; fax +1.408.850.1850
Current thread:
- Re: How do you stop outgoing spam?, (continued)
- Re: How do you stop outgoing spam? Valdis . Kletnieks (Sep 10)
- Re: How do you stop outgoing spam? Barry Shein (Sep 10)
- Re: How do you stop outgoing spam? sal . sabella (Sep 10)
- Re: How do you stop outgoing spam? alex (Sep 10)
- RE: How do you stop outgoing spam? Al Rowland (Sep 10)
- RE: How do you stop outgoing spam? alex (Sep 10)
- Re: How do you stop outgoing spam? Majdi S. Abbas (Sep 10)
- Re: How do you stop outgoing spam? Richard A Steenbergen (Sep 10)
- RE: How do you stop outgoing spam? Al Rowland (Sep 10)
- Re: How do you stop outgoing spam? Dave Crocker (Sep 16)
- Message not available
- Re: How do you stop outgoing spam? Dave Crocker (Sep 16)
- Message not available
- Re: How do you stop outgoing spam? Dave Crocker (Sep 17)
- Re: How do you stop outgoing spam? Barney Wolff (Sep 17)
- Re: How do you stop outgoing spam? Dave Crocker (Sep 18)
- Re: How do you stop outgoing spam? Barry Shein (Sep 18)
- Re: How do you stop outgoing spam? Barney Wolff (Sep 17)
- Message not available
- Re: How do you stop outgoing spam? Dave Crocker (Sep 18)
- Message not available
- Re: How do you stop outgoing spam? Dave Crocker (Sep 18)