How to migrate cpanel mail to new zoho mail?

Hi,

I have a client whose email (for his website domain) is currently on "cpanel mail". Now client wants to move to Zoho Mail. I checked migration docs and its mentioned that I can migrate using IMAP or POP but I am not getting exactly what steps should I follow in order to achieve this. As soon I will add clients domain and setup MX Records and SPF for that, I will lose access to currently setup email (cpanel mail) and without adding domain in zoho mail, I can't setup email for that.

Sorry if I am not been able to describe it properly. I am new to all these server setup and migration things.

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