Use the information on the MX Records page under Settings > Hybrid Service > Hybrid Configuration to configure your Mail eXchange (MX) records.
Your MX records, which end in in.mailcontrol.com, are listed on the MX Records page. Contact your DNS manager (usually your Internet service provider) and ask them to set up or replace your current MX records for each protected domain you have specified with the customer-specific records provided by the email hybrid service on the MX Records page. For example, they might change:
mydomain.com. IN MX 5 cust0000-1.in.mailcontrol.com.
mydomain.com. IN MX 5 cust0000-2.in.mailcontrol.com.
Click Finish to complete your hybrid configuration.