http://www.grafxsofftware.com/download/mailsender_ smtp.zip
Overwrite files in includes directory. Do a backup of cls_universal_mailsender and you need to edit new one in function SendMailLinux().
$smtp->host_name="HERE_SHOULD_BE_THE_HOST"; /* Change this variable to the address of the SMTP server to relay, like "smtp.myisp.com" */
$smtp->localhost=""; /* Your computer address */
$smtp->direct_delivery=0; /* Set to 1 to deliver directly to the recepient SMTP server */
$smtp->timeout=10; /* Set to the number of seconds wait for a successful connection to the SMTP server */
$smtp->data_timeout=0; /* Set to the number seconds wait for sending or retrieving data from the SMTP server.
Set to 0 to use the same defined in the timeout variable */
$smtp->debug=$this->mail_debug; /* Set to 1 to output the communication with the SMTP server */
$smtp->html_debug=$this->mail_debug; /* Set to 1 to format the debug output as HTML */
$smtp->pop3_auth_host="HERE_SHOULD_BE_THE_HOST"; /* Set to the POP3 authentication host if your SMTP server requires prior POP3 authentication */
$smtp->user="HERE_SHOULD_BE_THE_USER"; /* Set to the user name if the server requires authetication */
$smtp->realm="HERE_SHOULD_BE_THE_REALM"; /* Set to the authetication realm, usually the authentication user e-mail domain */
$smtp->password="HERE_SHOULD_BE_THE_PASSWORD"; /* Set to the authetication password */
$smtp->workstation=""; /* Workstation name for NTLM authentication */
$smtp->authentication_mechanism=""; /* Specify a SASL authentication method like LOGIN, PLAIN, CRAM-MD5, NTLM, etc..
Leave it empty to make the class negotiate if necessary */