Considering a machine with IIS 7.5/PHP 5.2/asp.net and mysql/MSSQL available, which webmail would you pick? Don't think it's relevant but the mail server is installed on localhost, and is hmailserver.
If it's one using asp.net it'd be a bonus, but PHP is ok as well and probably offers more choices.
"Client side" look and feel definitely needed, flash/silverlight/ajax not a problem.
I have also seen this question, but being asked almost 2years ago and being focused on php webmails, I thought that some better option could've been released in the meantime.
EDIT:
Has anybody had any experience with afterlogic webmail? Considering this or horde.
Not really a programming question, but you could try Roundcube or SquirrelMail. See also Horde.
For some friends i used horde webmail:
http://www.horde.org/webmail/
It has everything you need from a webmail.