We are developing Custom Commenting System in which email notifications will be sent to all the subscribers to the post just like "Disqus". We found AWS provides Simple Notification System(SNS) which does a fairly good job of sending mass email notifications and manages subscribers and topics, but I did not found any article on which the format of email notifications can be changed as all the emails have Amazon Branding.
Is it possible to send through Amazon SNS?
Thus removing Custom Amazon SNS branding.
I don't believe any customization is possible. For custom e-mails you should use Amazon SES instead. You would however need to manage unsubscribes yourself.