Configure your DNS settings
MX records are used to tell mail senders which server handles incoming email for domain. By setting the records as below you announce to the world that all mail for your domain should be directed to ImprovMX servers.
Connect to your domain registrar interface
MX records are set at your DNS provider which is usually the same as the domain registrar you’ve used to purchase your domain.
Delete previous “MX” entries
Delete all the previous “MX” entries you had registered for your DNS Zone, if any.
Add those MX entries
Host Value Priority @ mx1.improvmx.com 10 @ mx2.improvmx.com 20
Add this TXT entry for SPF support
Type Host Value TXT @ v=spf1 include:spf.improvmx.com ~all