nanog mailing list archives
RE: Is your ISP blocking outgoing port 25?
From: "Frank Bulk" <frnkblk () iname com>
Date: Mon, 22 Jun 2009 10:52:41 -0500
Thats e-mail client list covers less than 5% of my customer base and can't be construed as a standard. =) Even Microsoft doesn't support it in Outlook Express or Windows Mail. Frank -----Original Message----- From: Matthew Huff [mailto:mhuff () ox com] Sent: Monday, June 22, 2009 10:20 AM To: 'frnkblk () iname com'; 'John Levine'; 'nanog () nanog org' Subject: RE: Is your ISP blocking outgoing port 25? It already is used by Microsoft. Do a google for +Microsoft +Autodiscover. It is used by Outlook for Windows, Entourage for Mac, the iPhone and Windows Mobile devices. Like you suggested, it uses DNS based on the users email address and looks for a series of resolvable addresses the easiest being autodiscover.domain-name.tld (it has others because of SSL cert flexibility). It uses that address to download an XML file. The only tricky thing to set it up is that a lot of the documentation out there is dated. It has changed since it was first released and a lot of the documentation on technical blogs, and even on Microsoft's web site are incorrect. Once it's setup, however, it's great. ---- Matthew Huff | One Manhattanville Rd OTA Management LLC | Purchase, NY 10577 http://www.ox.com | Phone: 914-460-4039 aim: matthewbhuff | Fax: 914-460-4139
-----Original Message----- From: Frank Bulk [mailto:frnkblk () iname com] Sent: Monday, June 22, 2009 11:14 AM To: 'John Levine'; nanog () nanog org Subject: RE: Is your ISP blocking outgoing port 25? The bootstrap question is addressed by requiring the end-user to know their e-mail address and password. Based on the domain name, the implementation would reach out to https://something.domain-name.tld and download the relevant "schema" and data for IMAP, SMTP, POP3, etc, in ordered priority. Based on what the e-mail client could support, the desired settings would be displayed, and upon end-user approval, applied. This could be leveraged by RIM for their BIS, Microsoft/Gmail/etc for smartphones, and for third- party webmail hosts such as mail2web.com Frank -----Original Message----- From: John Levine [mailto:johnl () iecc com] Sent: Monday, June 22, 2009 9:24 AM To: nanog () nanog org Cc: frnkblk () iname com Subject: Re: Is your ISP blocking outgoing port 25?It's a pity that MAAWG or another group hasn't written a specification for the automatic downloading of configuration (with certificates, to be sure, for some kind of repudiation) and the update thereof, for adoption by the leading consumer e-mail clients.MAAWG decided it's not in the standards business, but it does BCPs pointing at standards elsewhere (mostly the IETF) that it encourages people to follow. Write a standard that people can use, and I don't think I'd have much trouble getting them to endorse it. It's an interesting design topic, particularly the bootstrap question of how the client decides where to look for its configuration. A lot of this stuff is already available via DHCP, but of course a key goal here is to set config info the last across reboots on different networks. Followup to IETF-something, I suspect. R's, John
Current thread:
- Re: Is your ISP blocking outgoing port 25?, (continued)
- Re: Is your ISP blocking outgoing port 25? Patrick W. Gilmore (Jun 19)
- Re: Is your ISP blocking outgoing port 25? Jeroen Wunnink (Jun 19)
- Re: Is your ISP blocking outgoing port 25? Sean Donelan (Jun 19)
- Re: Is your ISP blocking outgoing port 25? Steven King (Jun 19)
- Re: Is your ISP blocking outgoing port 25? Michael Thomas (Jun 19)
- Re: Is your ISP blocking outgoing port 25? Dave Pooser (Jun 20)
- RE: Is your ISP blocking outgoing port 25? Frank Bulk (Jun 22)
- Re: Is your ISP blocking outgoing port 25? John Levine (Jun 22)
- RE: Is your ISP blocking outgoing port 25? Frank Bulk (Jun 22)
- RE: Is your ISP blocking outgoing port 25? Matthew Huff (Jun 22)
- RE: Is your ISP blocking outgoing port 25? Frank Bulk (Jun 22)
- RE: Is your ISP blocking outgoing port 25? John R. Levine (Jun 22)
- RE: Is your ISP blocking outgoing port 25? Ted Hardie (Jun 22)
- Re: Is your ISP blocking outgoing port 25? Randy Bush (Jun 19)
- Re: Is your ISP blocking outgoing port 25? Tony Finch (Jun 19)