I often launch CentOS images on ec2, specifically the RightImage_CentOS_6.3_x64_v5.8.8.5_EBS (ami-3b7bfc52). It’s a great clean CentOS image if you need to run tests or install Kaltura on a clean machine. A common requirement is to have an email sending service, preferably postfix that will be stable and handle long queues of emails (to support for email notifications or alerts). According to this thread on the AWS forums, mainly to block spam, ec2 servers are by default blocked from Read more...