This setting can automatically block any email sent to you on behalf of your company by an external service (such as E-goi).
Fixing it is pretty simple. Just ask the tech folk in charge of your internal emails to make the following change in your domain's DNS.
1) Edit the domain's MX records (using the WHM manager).
2) Make sure to set the email exchanger rules to "Automatically Detect Configuration" and save your settings.
Done! From then on, emails you send using E-goi will get through to any address in your company.