SilkyMail was a commercial webmail client marketed by Cyrusoft from approximately 1999 to 2005. As of October 1, 2005, Cyrusoft International, Inc./ISAMET, has declared Chapter 7

Chapter 7, Title 11, United States Code

Chapter 7 of the Title 11 of the United States Code governs the process of liquidation under the bankruptcy laws of the United States...

 bankruptcy

Bankruptcy

Bankruptcy is a legal status of an insolvent person or an organisation, that is, one that cannot repay the debts owed to creditors. In most jurisdictions bankruptcy is imposed by a court order, often initiated by the debtor....

 and gone out of business.

SilkyMail was a browser-based alternative to Cyrusoft's primary e-mail client Mulberry

Mulberry (e-mail client)

Mulberry is a formerly proprietary, now open sourced email client marketed by Cyrusoft from approximately 1995 to 2005. On October 1, 2005, Cyrusoft International, Inc./ISAMET, declared Chapter 7 bankruptcy and went out of business...

. It was based on the popular Horde

Horde (software)

Horde is a PHP-based Web application framework.It offers applications such as the Horde IMP email client, a groupware package , a wiki and a time and task tracking software.-Horde Email Platform:...

 IMP

Internet Messaging Program

The Internet Messaging Program or IMP is an open source PHP-based webmail client for IMAP. IMP is a component of the Horde project.It is included with cPanel and Plesk installations as a webmail client...

 webmail package, but it added unique features like LDAP

Lightweight Directory Access Protocol

The Lightweight Directory Access Protocol is an application protocol for accessing and maintaining distributed directory information services over an Internet Protocol network...

 and IMSP

IMSP

IMSP is Internet Message Support Protocol. Defined in a 1995 , which carries this abstract:Work on standardizing IMSP was never completed because development of the ACAP protocol, which has a superset of IMSP's functionality.- Implementations :...

 and was more polished and easier to set up at the time, due to the way it was packaged. It was marketed as "the smoothest mail client in a browser around". Its source code was available for free under GPL, however the package was sold at "prices as low as pennies per user", and site support packages were offered starting at $500 per site.