Overview
A hostname, combination of optional subdomain and mandatory domain, may be configured to act as an e-mail domain, ie. receive e-mails on that host. These hostnames are added via Mail > Mail Routing. For any domain present there, the server will act as the final destination bypassing MX lookups. This will result in problems if you use third-party MX records.
The following is a brief list of composite examples:
| Subdomain | Domain | Hostname | Valid e-mail | Notes |
|---|---|---|---|---|
| mydomain.com | mydomain.com | myuser@mydomain.com | ||
| foo | mydomain.com | foo.mydomain.com | myuser@foo.mydomain.com | |
| foo | “foo” | Invalid, non-FQDN | ||
| myotherdomain.com | myuser@myotherdomain.com | myotherdomain.com | E-mail delivers to same inbox unless namespaced |
Once a hostname is authorized through Mail Routing, corresponding DNS entries are created and will be active so long as you use our hosting nameservers.
Third-party nameserver DNS
If you use third-party nameservers – nameservers other than ours – use the following DNS template to properly route mail once a hostname is added in Mail Routing:
<hostname> IN MX 10 mail.<hostname> mail.<hostname> IN A <IP address>