>Thanks for the response Sergey.
>
>I got tired of the extreme slowness of Outlook and started looking for alternatives. As long as I was planning change I looked for other characteristics, including the ability to check mail from more than one place, easily organize mail in several folder levels, do fast searches, and more. I sometimes use Hotmail which you can read from anywhere but falls short in other ways. Then I found Postbox and asked the developer for suggestions and he suggested finding an IMAP server which coupled with Postbox may do what I need.
>

Gmail supports IMAP but doesn't provide a way to organize data in a hierarchical fashion.