nanog mailing list archives
Re: ingress SMTP
From: "Jay R. Ashworth" <jra () baylink com>
Date: Wed, 3 Sep 2008 12:49:41 -0400
On Wed, Sep 03, 2008 at 09:40:20AM -0700, Michael Thomas wrote:
"Allowing unfiltered public access to port 25 is one of the things that increases everyone's spam load, and your ISP is trying to be a Good Neighbor in blocking access to anyone's servers but their own; many ISPs are moving towards this safer configuration. We're a good neighbor, as well, and support Mail Submission Protocol on port 587, and here's how you set it up -- and it will work from pretty much anywhere forever."I think this all vastly underrates the agility of the bad guys. So lots of ISP's have blocked port 25. Has it made any appreciable difference? Not that I can tell. If you block port 25, they'll just use another port and a relay if necessary.
You're forgetting that 587 *is authenticated, always*. The issue here, though, was that of an Enhanced Mail Provider's clients being unable to get through blocks *set by their client's ISPs*. The EMP has no control over that except to switch said clients to MSP (which they really should have done to begin with, as someone else notes). Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com '87 e24 St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274 Those who cast the vote decide nothing. Those who count the vote decide everything. -- (Josef Stalin)
Current thread:
- RE: ingress SMTP, (continued)
- RE: ingress SMTP Tim Sanderson (Sep 03)
- Re: ingress SMTP Jay R. Ashworth (Sep 03)
- RE: ingress SMTP Frank Bulk (Sep 03)
- Re: ingress SMTP Eugeniu Patrascu (Sep 07)
- Re: ingress SMTP Jay R. Ashworth (Sep 03)
- Re: ingress SMTP Justin Scott (Sep 03)
- Re: ingress SMTP Alec Berry (Sep 03)
- Re: ingress SMTP Justin Scott (Sep 03)
- Re: ingress SMTP Alan Hodgson (Sep 03)
- Re: ingress SMTP Jay R. Ashworth (Sep 03)
- Re: ingress SMTP Michael Thomas (Sep 03)
- Re: ingress SMTP Jay R. Ashworth (Sep 03)
- Re: ingress SMTP Nicholas Suan (Sep 03)
- Re: ingress SMTP Jay R. Ashworth (Sep 03)
- Re: ingress SMTP Valdis . Kletnieks (Sep 03)
- Re: ingress SMTP Tony Finch (Sep 04)
- Re: ingress SMTP David Champion (Sep 04)
- Re: ingress SMTP Joel Jaeggli (Sep 10)
- Re: ingress SMTP Robert E. Seastrom (Sep 11)
- Re: ingress SMTP Bill Stewart (Sep 12)
- Re: ingress SMTP Mark Foster (Sep 12)
- Re: ingress SMTP Matthew Moyle-Croft (Sep 12)
- Re: ingress SMTP Alec Berry (Sep 03)
- RE: ingress SMTP Tim Sanderson (Sep 03)