Until email data is migrated donot change or update any nameservers otherwise may result in mail data loss. Mail data migration tool donot delete your email data it only downloads the copy of it.
Login to your web hosting control panel at https://cp.controlpanel.systems/ using the login details provided.
Create all same named email ids users on new web hosting ac control panel with us.
Now goto control panel option named "Email Migrations" screenshot below
One by one you need to mention existing email server IMAP hostname, username and password of your existing email id with other web host and then decide on which mailbox with us that data shall be copied. Screenshot below:
Please have it done for one mailbox > Verify from https://stackmail.com/ if your email data is present after migration completed and do the same for other mailboxes too.
For technical support feel free to contact us anytime support@webji.services via email from registered email id in our records.