When sending emails from you workspace, via Backstage, the @spotme.com domain is used by default.
The Emailing module on SpotMe Backstage allows you to use your own domain name when sending app activation emails, invitations or others.
This however requires a change on a certain email authentication method, called SPF.
The SPF (Sender Policy Framework) is designed to detect forging sender addresses during the delivery of the email.
If you use your own domain to send emails from SpotMe Backstage, without first updating the SPF record of that domain, it is highly unlikely that any of the participants will receive the emails.
To ensure emails are received, the SPF record of your domain needs to include "220.127.116.11", as follows:
v=spf1 ip4:18.104.22.168 -all
The SPF record can be updated via the DNS server by the administrator. Therefore, to change the domain name for emails sent from your workspace, you will need to contact your organization's dedicated IT department.