I have an Amazon EC2 instance. My postfix server sometimes tries to send outbound emails (web form etc) to ipv6 addresses. It fails and the emails go into the queue.
Is there a way to prevent postfix from getting ipv6 mx records, OR allow my instance to connect to ipv6 mail servers?
I don't need to service inbound ipv6 requests.
Is it possible to setup an ipv6 interface with an internal address only (i don't think amazon will give me one).