Microsoft had a product that try targeted to the service provider segment I do not know if they still offer it. Sent from my Windows Phone -----Original Message----- From: Santino Codispoti Sent: Tuesday, June 07, 2011 10:31 PM To: Syed Waqqas Ahmed Cc: nanog@nanog.org Subject: Re: Hotmail? We do not have Exchange this would be for a consumer e-mail service that is ad supported. On Tue, Jun 7, 2011 at 10:28 PM, Syed Waqqas Ahmed <waqqasahmed@gmail.com> wrote:

If you already have MS Exchange just use OWA (outlook web access) feature to enable webaccess. but like suresh said its storage, directory services and mail traffic that matters most.

regards syed.

On Tue, Jun 7, 2011 at 10:23 PM, Suresh Ramasubramanian <ops.lists@gmail.com> wrote:

...

400k is easy enough to do with either high end enterprise or low end carrier grade products.

Or if you have the patience to do it, open source ftw.

The MTA isn't the criterion here as much as all the other stuff - bandwidth, storage, directory services, security / antispam ...

--srs

On Wed, Jun 8, 2011 at 7:43 AM, Santino Codispoti <santino.codispoti@gmail.com> wrote:

...

Does anyone happen to know what Microsoft using to delivery Hotmail? Is it Exchange? Can anyone recommend a good system for developing web mail services? I need something that can easy support 400K users

-- Suresh Ramasubramanian (ops.lists@gmail.com)