Open config.inc.php from testlink folder
$g_tl_admin_email = ‘admin@abc.com'; # for problem/error notification
$g_from_email = ‘XYZ@abc.com'; # email sender
$g_return_path_email = 'no_replay@127.0.0.1';
// SMTP Configuration
$g_smtp_host = 'server_name.com'; # SMTP server must be configured
In : Testlink
