DNS for AWS EC2 and MX records for Google Apps?

Question

Domain Name System

So the task is:

• Link domain to Load Balancer on Amazon EC2
  
• Link soap to Google Apps
  

The first part was successfully solved: I created a CNAME with the corresponding Public DNS The
second part was done like this:
MX 1: aspmx.l.google.com
MX 2: alt1.aspmx.l.google.com
Result: The domain works, mail from the gmail interface leaves and comes where you want with the correct address. But does not come when someone sends to the given address.
That is, mail from [email protected] leaves, but mail does not arrive at [email protected] At the same time, Message Delivery Failed does not come. That is, the letter is simply lost.
The domain is registered with the German registrar united-domains.de
Another important point: various lookup services normally perform ns-lookups, but report something like “Server response failed” during mx-lookup.
Question: perhaps someone has already registered a domain in this way (EC2 + Google Apps) and will prompt/show their settings. I just can’t understand: I’m stupid or the registrar.

Answer 1

The problem is in the DNS record. "Delivery failed" may still come, but later (the mail server has to try a few more times).
MX record does not affect outgoing mail, MX is needed only for incoming mail.
It would be useful to provide the full record of the domain zone so that you know what is wrong there. Or the domain itself if the zone is allowed for download.