When the seppmail.cloud provisions a domain, SEPPmail assumes the domain consists of 2 parts:

• The domain name, for example "contoso" and the
• Toplevel domain (tld), for example "com"

So when you provision contoso.com, SEPPmail refers to it as domain.tld.

Hostnames in parallel mode

In parallel mode, SEPPmail generates a host called domain-tld.mail.seppmail.cloud, which handles in and outbound traffic.

For a provisioned domain contoso.com, this would lead to contoso-com.mail.seppmail.cloud.

Hostnames in inline mode

In inline mode, SEPPmail creates 2 hostnames with a similar scheme, called gate and relay.

• contoso-com.gate.seppmail.cloud
• contoso-com.relay.seppmail.cloud

Gate is responsible for receiving E-mails (MX points to gate).

Relay is responsible for sending E-mails to the Internet (smarthost).