atmail is a commercial Linux messaging platform provider. The company was founded in 2001, and is headquartered in Peregian Beach, Australia. The company develops webmail, mail-server and groupware solutions built for Linux and other Unix operating systems, and includes the source code under a commercial license.
Originally developed in 1998, the software is now referred to as atmail instead of the original name '@Mail'. It was initially developed in Perl, later in PHP using the Zend Framework. On May 19, 2008, a free version of the atmail webmail client was released. It is a lightweight, webmail-only version of the commercial application and is distributed under the Apache 2.0 license.