Rails inline mail attachments not working properly -

i using actionmailer send inline image. user_mailer.rb file looks this:

def welcome_mail(user, mail_content, subject)    @user = user    @mail_content = mail_content.html_safe    attachments.inline['orglogo.png'] = file.read("#{rails.root}/app/assets/images/orglogo.png")    mail(:to => ["testuser@domain.com"],:subject => subject)  end  

and view contains:

<%= image_tag attachments['orglogo.png'].url %>  

the image isn't appearing in mail. how appears in mail client. have tested on outlook , hotmail.

in production app sending inline image using above method , me working fine me. created public gist working snippet of code. please see if helps you. gistpublic gist mailers

if doesn't work please try paste development.log here.

thanks