Hi,
While sending a mail, the recipient receives the mail with all the contents of the file as a text. I dont want the file contents to be shown directly. I want the file to sent as an attachment to mail. As per my analysis, the following are the standard tags read by SMTP. Now to attach a file there has to be some tag which will tell SMTP to attach it. Please help me to find the tag and where it should be placed in the example below.

HELO there
MAIL FROM : < xyz@gmail.com >
RCPT TO : < abc@yahoo.com >
DATA
From: xyz@gmail.com
To: abc@yahoo.com
Subject: Hi..!!!
Hello How are u...???
QUIT
Thanks in advance