primary domain email using hostname

[inbloombr]

Hi, i'v installed cpanel. in a vps test.
After the initial configuration and installation, i go trough webmail and send an email test.

the email is coming as [email protected]

as should it be

[email protected]

This hostname from initial configuration of whm is a subdomain?
I have to create it on cpanel or add a host. cname?

I think i am miss something about hostname.

Thanks

 

[storminternet]

Hostname appears to be as mail server identity in email headers. I don't think there is any issue.