EC2 Scalable environment sending mail from instances

I have an scalable environment on开发者_运维知识库 amazon cloud. I want to send emails (transactional, mailing) from EC2 instances.

I am using one elastic Ip for my load balancer. I have installed postfix on all my instances.

Now, I got mail from amazon saying this

"You recently reached a limit on the volume of email you were able to send out of SMTP port 25 on your instance:"

1) Do I have to use any mail service provider to send mails (eg: http://aws.amazon.com/ses/)? 2) I googled it, people suggesting to send request to amazon through this link

https://aws-portal.amazon.com/gp/aws/html-forms-controller/contactus/ec2-email-limit-rdns-request

If I have go with 2nd option, Do I have to take another elastic ip?

Could somebody explain me the proper way to send request.

I sent request to Amazon. They have removed the limit.