Our system has detected that this message isMessage could not be

Dear,
First of all, thanks you very much for your contribution. it's help lot.

I need you help on below points.

First Our Setting ....
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$smtp=new smtp_class;

$smtp->host_name='*******.com'; //IP address /* Change this variable to the address of the SMTP server to relay, like "smtp.myisp.com" */
$smtp->host_port=25; /* Change this variable to the port of the SMTP server to use, like 465 */
$smtp->ssl=0; /* Change this variable if the SMTP server requires an secure connection using SSL */
$smtp->start_tls=0; /* Change this variable if the SMTP server requires security by starting TLS during the connection */
$smtp->localhost="localhost"; /* Your computer address */
$smtp->direct_delivery=1; /* 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=1; /* Set to 1 to output the communication with the SMTP server */
$smtp->html_debug=1; /* Set to 1 to format the debug output as HTML */
$smtp->pop3_auth_host=""; /* Set to the POP3 authentication host if your SMTP server requires prior POP3 authentication */
$smtp->user=""; /* Set to the user name if the server requires authetication */
$smtp->realm=""; /* Set to the authetication realm, usually the authentication user e-mail domain */
$smtp->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 */



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When we trying to send email into public domain like gmail, yahoo and other it throw below message like...


"Our system has detected that this message isMessage could not be sent"


Kindly help us on same.


Thanks & Regards,
Jaiswar Vipin Kumar R
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Can you please show the debug output that the class generates when communicating with the server?