[115455] in North American Network Operators' Group
RE: Is your ISP blocking outgoing port 25?
daemon@ATHENA.MIT.EDU (Frank Bulk)
Mon Jun 22 11:53:29 2009
X-Barracuda-Envelope-From: frnkblk@iname.com
From: "Frank Bulk" <frnkblk@iname.com>
To: "'Matthew Huff'" <mhuff@ox.com>, <frnkblk@iname.com>,
"'John Levine'" <johnl@iecc.com>, <nanog@nanog.org>
In-Reply-To: <483E6B0272B0284BA86D7596C40D29F9C381C14373@PUR-EXCH07.ox.com>
Date: Mon, 22 Jun 2009 10:52:41 -0500
Reply-To: frnkblk@iname.com
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
That=92s e-mail client list covers less than 5% of my customer base and =
can't
be construed as a standard. =3D) Even Microsoft doesn't support it in =
Outlook
Express or Windows Mail.
Frank
-----Original Message-----
From: Matthew Huff [mailto:mhuff@ox.com]=20
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.=20
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.=20
----
Matthew Huff=A0=A0=A0=A0=A0=A0 | One Manhattanville Rd
OTA Management LLC | Purchase, NY 10577
http://www.ox.com | Phone: 914-460-4039
aim: matthewbhuff=A0 | Fax:=A0=A0 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?
>=20
> 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
>=20
> Frank
>=20
> -----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?
>=20
> >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.
>=20
> 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.
>=20
> 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.
>=20
> Followup to IETF-something, I suspect.
>=20
> R's,
> John
>=20
