The imap extension comes as standard with the PHP installation. You just need to enable it in your php.ini   Enable IMAP in XAMPP: You need to configure your php.ini file to enable IMAP extension Search for the line ;extension=php_imap.dll and remove semicolon(;) and restart your xampp. The line should look like as mentioned below. extension=php_imap.dll Note : New php version does not have dll anymore. The default php.ini should already contain a line to load the extension but commented out: ;extension=imap Remove semicolon from above like below extension=imap Enable IMAP in Linux: If you are using LAMP server, First install IMAP using the command on terminal $ sudo apt-get install php5-imap To enable IMAP, run the following command. sudo phpenmod imap Restart apache server with below command sudo service apache2 restart