This Contact Form using a SMTP. We are using the SMTP is not the PHP mail() function because the mail function can be attached to the mails sent by the ip filter . Can fall to junk box. Used by many open-source projects: Wordpress, Drupal, 1CRM, SugarCRM, Yii, Joomla! and many more Integrated SMTP support - send without a local mail server SMTP authentication with LOGIN, PLAIN, NTLM and CRAM-MD5 mechanisms over SSL and TLS transports