What are your MX servers?
If your domain uses external name servers and you want to use Opalstack's mail services with that domain, then you must create MX records to point your domain at the mail service.
This is normally done via your domain registrar, or via whoever manages the NS records for your domain.
Opalstack's MX servers are:
These MX servers are available for all Opalstack customers - we recommend you select the region closest to your domain's target audience. We will be adding more regions in the future.
Note: if your domain uses Opalstack's name servers then your Opalstack MX records will be generated automatically in our DNS system.