Server Requirements

• Apache or Lighttpd Webserver
  
• .htaccess support allowing overrides for DirectoryIndex? if using Apache
  
• PHP Version 4.3.1 or Greater
  
• PCRE (Perl compatible Regular Expression) installed with PHP
  
• php.ini options:
  
  • error_reporting E_ALL & ~E_NOTICE (or lower)
    
  • file_uploads on (for attachment upload features)
    
• MySQL or PostgreSQL database engine or the SQLite Extension for PHP
  
• OpenSSL and Socket modules for PHP required for Spell Checking
• A database with permission to create tables
  
• An IMAP server
• An SMTP server

Browser Requirements

• Javascript enabled
• Accept cookies
• Support for XMLHttpRequest