Inline Attachment for mail

I need to attach images to the mails which are going from my
application. I have followed the comments and guidelines said in
http://blog.thoughtobject.com/2007/05/26/5/

The mail which is received by the user has both image and message
content.

But the image which im getting doesnt gets fixed the place where it is
specified.

Images gets seperated from the message content.

At the end of the mail all the image are displayed..

in mailer.rb i have used as

@cid = Time.now.to_f.to_s + "abc@domain.com"
inline_attachment :content_type => "image/gif",
                      :body => File.read("#{RAILS_ROOT}/public/images/
mails_images/abc.jpg)
                      :filename => abc.jpg
                      :cid => "<#{@cid}>"

and in view i called as

<img src='cid:<%= @cid %>' />