MAPI4Webmail is described as 'Extension for Webmail accounts (eg. GMail, Yahoo, Outlook, ...) enabling real MAPI support. With MAPI4Webmail you can send emails with attachments from any application supporting MAPI' and is a webmail provider in the office & productivity category. There are 2 alternatives to MAPI4Webmail for Windows. The best MAPI4Webmail alternative is Affixa. It's not free, so if you're looking for a free alternative, you could try Affixa or GmailDefaultMaker.
Affixa makes your webmail account part of Windows. Affixa makes gathering and preparing the files you want to send easy. Affixa gives you the choice of which web or desktop mail system you use and when.
Gmail as the default mailto: client. Yahoo, AOL, and Hotmail are now also supported. The Gmail compose message webpage opens with the To: box filled in automatically instead of a desktop client like Outlook, Windows Live Mail, or Thunderbird.
