nanog mailing list archives
Re: The End-To-End Internet (was Re: Blocking MX query)
From: Sean Harlow <sean () seanharlow info>
Date: Wed, 5 Sep 2012 11:51:54 -0400
On Sep 5, 2012, at 11:46, Greg Ihnen wrote:
But as someone pointed out further back on this thread people who want to have their mail servers available to people who are on the other side of port 25 filtering just use the alternate ports. So then what does filtering port 25 accomplish?
The alternate port 587 is for users of that mail server to send mail through it, presumably authenticated, not for receipt of random mail from the internet. This allows those users to relay email through their server unaffected while behind a port 25 block. Configuring it to accept all messages on that port would defeat the purpose. --- Sean Harlow sean () seanharlow info
Current thread:
- The End-To-End Internet (was Re: Blocking MX query) Jay Ashworth (Sep 04)
- Re: The End-To-End Internet (was Re: Blocking MX query) Seth Mattinen (Sep 04)
- Re: The End-To-End Internet (was Re: Blocking MX query) Daniel Taylor (Sep 04)
- Re: The End-To-End Internet (was Re: Blocking MX query) Michael Thomas (Sep 04)
- Re: The End-To-End Internet (was Re: Blocking MX query) Daniel Taylor (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Henry Stryker (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Izaac (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Greg Ihnen (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Sean Harlow (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Izaac (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Cutler James R (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) William Herrin (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Måns Nilsson (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Michael Thomas (Sep 04)
- Re: The End-To-End Internet (was Re: Blocking MX query) Sean Harlow (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Michael Thomas (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Michael Thomas (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Henry Stryker (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) John Levine (Sep 05)
- Re: The End-To-End Internet (was Re: Blocking MX query) Michael Thomas (Sep 05)