Can't receive email, Lightsail / Plesk

Question

Any help appreciated..  
  
I have created a Plesk instance in Lightsail. I am successfully hosting a website in the instance. I have added an email account in plesk which can send emails...but I cannot receive emails. I suspect DNS settings issue, and am actually a little unclear re Lightsail server DNS vs Plesk DNS.  
  
Error for return emails:

```
: Host or domain name not found. Name service error for name=mail.kore.health type=A: Host not found
```

Lighsail server DNS (zone file, edited by me several times):

```
A Record @.kore.health resolves to server
A Record mail.kore.health resolves to server
A Record webmail.kore.health resolves to server
A Record www.kore.health resolves to server
MX Record @.kore.health maps to kore.health
```

Plesk dns settings (not all):

```
    ipv4.kore.health.    A    35.182.130.76
    kore.health.    MX (10)    mail.kore.health.
    kore.health.    A    35.182.130.76
    webmail.kore.health.    A    35.182.130.76
    ns2.kore.health.    A    35.182.130.76
    mail.kore.health.    A    35.182.130.76
    ns1.kore.health.    A    35.182.130.76
```

My domain nameservers are set to the Lightsail server provided ones. I looked for ones provided by Plesk but could not find any.  
  
Any ideas?

Answer

The Plesk DNS settings are not used if you set your nameservers to Amazon's. If you want to use your Plesk nameservers, those would be ns1.kore.health and ns2.kore.health. You would have to register those with your registrar. Officially, however, the two nameservers need to have separate IP addresses, which isn't the case here.  
  
If you continue to use the Amazon nameservers, double-check the A record for the "mail" subdomain, because it's not resolving, as the error indicates. The records for "webmail", "www", etc. look fine, just not the "mail" one. The MX record is also not showing up; it would have to read something like "10 mail.kore.health".

Can't receive email, Lightsail / Plesk

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