What is going wrong ? I checked in the gui in Outgoing Destinations, for this domains and I didnt find anything about this domains. Also isn't there not much more emails like before (it seems everything is ok). Only my mailservers are allowed to send emails over the appliance. But I didnt find anything at the mail servers in the logs.
Looks like you've got at least two different causes in there. You managed to connect to Amazon, but they hung up on you. That at least verifies that your network connectivity is working, but who knows why Amazon hung up on you.
Most of the rest look like spam domains:
Spam domains typically don't run SMTP servers, so any mail sent to them will be undeliverable. You say that only your own mail servers are allowed to send via your appliance, but someone is injecting those messages. Look them up in your mail_logs to see where they're coming from.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...