nanog mailing list archives
Re: SMTP authentication for broadband providers
From: Valdis.Kletnieks () vt edu
Date: Wed, 11 Feb 2004 15:23:18 -0500
On Wed, 11 Feb 2004 15:13:30 EST, Sean Donelan said:
So is it time for ISPs to start blocking port 587 too?
RFC2476 says: 3.2. Message Rejection and Bouncing MTAs and MSAs MAY implement message rejection rules that rely in part on whether the message is a submission or a relay. For example, some sites might configure their MTA to reject all RCPT TOs for messages that do not reference local users, and configure their MSA to reject all message submissions that do not come from authorized users, based on IP address, or authenticated identity. Is there any indication that there are enough sites *NOT* doing some sort of authentication check on accepting messages on port 587 that it's worth the effort of blocking? Or should we just say "Submit mail via webmail, let's see the ISP block *THAT*"?
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Current thread:
- SMTP authentication for broadband providers Dan Ellis (Feb 10)
- Re: SMTP authentication for broadband providers Will Yardley (Feb 10)
- Re: SMTP authentication for broadband providers Adi Linden (Feb 10)
- Re: SMTP authentication for broadband providers Dave Crocker (Feb 11)
- Re: SMTP authentication for broadband providers Alex Bligh (Feb 11)
- Re: SMTP authentication for broadband providers Valdis . Kletnieks (Feb 11)
- Re: SMTP authentication for broadband providers Sean Donelan (Feb 11)
- Re: SMTP authentication for broadband providers Will Yardley (Feb 11)
- Re: SMTP authentication for broadband providers Suresh Ramasubramanian (Feb 11)
- Re: SMTP authentication for broadband providers Valdis . Kletnieks (Feb 11)
- Re: SMTP authentication for broadband providers Sean Donelan (Feb 11)
- Re: SMTP authentication for broadband providers Dave Crocker (Feb 11)
- Re: SMTP authentication for broadband providers Daniel Senie (Feb 11)
- Re: SMTP authentication for broadband providers Sean Donelan (Feb 11)
- Re: SMTP authentication for broadband providers Alex Bligh (Feb 11)
- Re: SMTP authentication for broadband providers Sean Donelan (Feb 11)
- Re: SMTP authentication for broadband providers Alex Bligh (Feb 11)
- Re: SMTP authentication for broadband providers Dave Crocker (Feb 12)
- Re: SMTP authentication for broadband providers Lou Katz (Feb 11)
- <Possible follow-ups>
- RE: SMTP authentication for broadband providers Mark Segal (Feb 11)