SquirrelMail is a PHP4-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It also has MIME support, folder manipulation, etc. Today, after a very long wait, the first stable child of the past development series, 1.4.0, has seen the light! It includes enhancements for stability, performance and compatibility, plus new features and many bugfixes. We consider this the best version of SquirrelMail available.