nanog mailing list archives
Re: Why do so few mail providers support Port 587?
From: Paul Vixie <vixie () vix com>
Date: 24 Feb 2005 22:44:35 +0000
On Tue, Feb 15, 2005 at 09:00:11PM -0500, Sean Donelan wrote:Although RFC2476 was published in December 1998, its amazing how few mail providers support the Message Submission protocol for e-mail on Port 587. Even odder, some mail providers use other ports such as 26 or 2525, but not the RFC recommended Port 587 for remote authenticated mail access for users.
well, in sbc-dsl-land, port 25 and port 587 are blocked, but port 26 gets through. it seems bizarre that port 587 would ever be blocked, but when i encountered it, port 26 was my next choice. perhaps other e-mail providers had the same problem and used the same plan-b.
What can be done to encourage universities and other mail providers with large roaming user populations to support RFC2476/Port 587?Give a good reason. That is still the missing part.
it's smtp that only works if you can authenticate. thus it's only useful for your own user population, and completely safe to leave open to the world (as long as your user population keeps their passwords safe, that is.) -- Paul Vixie
Current thread:
- Re: Why do so few mail providers support Port 587?, (continued)
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- Re: Why do so few mail providers support Port 587? Adrian Chadd (Feb 25)
- Re: Why do so few mail providers support Port 587? Eric A. Hall (Feb 25)
- Re: Why do so few mail providers support Port 587? Frank Louwers (Feb 25)
- Re: Why do so few mail providers support Port 587? Valdis . Kletnieks (Feb 25)
- Re: Why do so few mail providers support Port 587? Nils Ketelsen (Feb 25)
- Re: Why do so few mail providers support Port 587? Joe Maimon (Feb 25)
- Re: Why do so few mail providers support Port 587? Eric A. Hall (Feb 25)
- Re: Why do so few mail providers support Port 587? Nils Ketelsen (Feb 24)
- Re: Why do so few mail providers support Port 587? Valdis . Kletnieks (Feb 24)
- RE: Why do so few mail providers support Port 587? andrew2 (Feb 25)
- Re: Why do so few mail providers support Port 587? Andrew - Supernews (Feb 24)
- Re: Why do so few mail providers support Port 587? Robert L Mathews (Feb 26)
- Re: Why do so few mail providers support Port 587? Jim Popovitch (Feb 26)
- Re: Why do so few mail providers support Port 587? Mikael Abrahamsson (Feb 26)
- Re: Why do so few mail providers support Port 587? Adrian Chadd (Feb 15)
- Re: Why do so few mail providers support Port 587? Bob Martin (Feb 15)