Below you will find the instructions to assist you with configuring your MX Record for your domain through BlueHost's admin portal:
Scroll down to the DNS Section and select the the DNS Zone Editor.
Note: If you have multiple domains on your account make sure the correct domain name is selected from the Domain drop-down menu.
Within the Host Record field: Enter the @ symbol.
For the TTL field: Unless otherwise instructed its best to leave the Time To Live at 14400.
For Type: Select "MX" from the drop down menu.
For the Points To field: Enter mail1.redtailtechnology.com
For the Priority field: Simply leave the default value.
To create and publish the changes, click the Add Record button.