mail migration Can not connect to the server for IMAP and POP protocols

I created this second post as I can not find my initial post in My Area (I see 0 Posts and 0 Reponses).

I always get Can not connect to the server

Thank you for your response:

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Thank you for contacting Support.

We see that you've managed to verify your domain with us.

You need to configure Zoho's recommended Mx records in your DNS page to receive emails from external domains.

Zoho Mail provides you a range of email migration options (POP or IMAP) for server to server migration.

In case of Exchange hosted environment, we provide you an Exchange Migration wizard which can be used to migrate directly from Exchange Server or even from individual PST files.

The detailed process to migrate your email service from current provider to Zoho Mail is explained in this help page.

Please refer the help page to know more about our email hosting setup.

We request you to provide more details about your other requirements to take this further.

Sincerely,
Arivalagan A

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Well, do I really need to add MX records to my DNS page in order to migrate mail?

This help page https://www.zoho.com/mail/help/pop-imap-migration.html#alink2 tells nothing about any MX records that I need for migration.