Why aren't emails from my external POP account getting populated in my Zoho mailbox even after adding the account?

Why aren't emails from my external POP account getting populated in my Zoho mailbox even after adding the account?

Zoho Mail retrieves a maximum of 200 emails per fetch from your POP server. Since the number of emails in your external account will be high initially, it might take about 3 to 5 days for all the emails to be populated in your mailbox. Learn more.