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Webmail (or Web-based e-mail) is an e-mail service intended to be primarily accessed via a web browser, as opposed to through a desktop e-mail client (such as Microsoft Outlook, Pegasus Mail, Mozilla's Thunderbird, or Apple Inc.'s Mail). Very popular webmail providers include Gmail, Yahoo! Mail, Hotmail, and AOL.[1]

One advantage of webmail over application-based e-mail is that a user has the ability to access their inbox from any Internet-connected computer around the world. However, the need for Internet access is also a drawback, in that one cannot access old messages when not connected to the Internet (with the exception of some newer technologies, such as Gmail's "Offline Mail"[2] feature). On the other hand, if one uses the IMAP protocol through an application-based e-mail client, all contents of the mailbox will be consistently displayed in both the webmail and the PC e-mail client contexts.

In 1997, before its acquisition by Microsoft, Hotmail (now Windows Live Hotmail) introduced its service, which became one of the first popular web-based e-mail offerings. Following Hotmail's success, Google's introduction of Gmail in 2004 sparked a period of rapid development in webmail, due to Gmail's new features such as JavaScript menus, text-based ads, and bigger storage.



The first webmail software was called simply WebMail and was developed in perl by Luca Manunza[3][4] when he was working at CRS4, in Sardinia. The first working demo[5] was released on March 10, 1995; thereafter the source[6] was released (with registration required) on March 30, 1995.

Software packages

There are also software packages that allow organizations to offer e-mail through the web for their associates. Some solutions are open source software like SquirrelMail, RoundCube, BlueMamba, IlohaMail, and UebiMiau, while others are closed source like the Outlook Web Access module for Microsoft Exchange. Conversely, there are programs that can simulate a web browser to access webmail as if it were stored in a POP3 or IMAP account. They are susceptible, though, to changes in the user interface of the web service since there is no standard interface.

Some providers offer web access to other's e-mail servers. This allows web access to mailboxes where the mail server does not offer a web interface, or where an alternative interface is desired.

Rendering and compatibility

There are important differences in rendering capabilities for many popular webmail services such as Yahoo Mail, Gmail, and Windows Live Hotmail. Due to the various treatment of HTML tags, such as <style> and <head>, as well as CSS rendering inconsistencies, e-mail marketing companies rely on older web development techniques to send cross-platform mail. This usually means a heavy reliance on tables and inline stylesheets.

See also


  1. Brownlow, Mark "Email and webmail statistics", Email Marketing Reports, January, 2009
  2. "Offline Gmail" Official Gmail Blog, January 27, 2009
  3. Pinna alberto "Soru: un incontro con Rubbia, così nacque il web in Sardegna" Corriere della Sera, December 28, 1999 (in italian)
  4. Ferrucci Luca "The ICT in Sardinia: Start up and evolution"
  5. "Demo release"
  6. "Source code release"
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