There is no direct way to change the email type from IMAP to POP once it is set. You need to re-set up from the start to change the email type. You need to remove your current email account and add a new one.
Follow the how-to configure email account guides using the link below.
If you require any assistance, feel free to reach us by using our live chat at https://mint.com.bn or by creating a support ticket on this portal.