I found the script below and modified some of the field. It was a fail script when I ran it at the first time. Then I found out the "as alias" which placed after the attachment field is a must. As the script has to duplicate the object and paste into the email. I am going to automate the script to mail attachment on my desktop to this blog. Safari has an option to save picture on desktop. That is a common task for me to execute as I save image when I browse around the web. Will post it once I able to run it smoothly.
set theSubject to "new subject"
set theBody to "this is the message body"
set theSender to "Simon"
set theName to ""
set theAddress to "receiver email address"
set theAttachment to "Macintosh HD:Users:Desktop:raina.jpg" as alias
tell application "Mail"
set newMessage to make new outgoing message with properties {subject:theSubject, content:theBody & return & return}
tell newMessage
set visible to true
set sender to theSender
make new to recipient at end of to recipients with properties {name:theName, address:theAddress}
tell content
make new attachment with properties {file name:theAttachment} at after the last paragraph
end tell
end tell
activate
end tell
