- login to cpanel using email account and password

- list will appear to you ,choose services

- list of services will appear to you ,choose the service you want to control

- list of actions will appear ,choose login to cpanel ,As in the following image

- list of Domains will appear to you ,choose Zone editor,As in the following image

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Locate the domain for which you want to add an MX record, and then click MX Record ,As in the following image

- In the Add an MX Record dialog box, in the Priority text box, type a priority. and In the Destination text box, type the fully-qualified domain name (FQDN) of the mail server.
