ZohoMail and Apple Mail POP problems

ZohoMail and Apple Mail POP problems

Hello,

I have a new domain name and ZohoMail account via Portfoliobox.net since yesterday.
I want to receive all the incoming mails for my new email address (arriving in ZohoMail) in my Apple Mail program.
I tried to configure ZohoMail as POP account and created a new Apple Mail Pop account for ZohoMail  following the instructions  in your Help pages  with no success

I only received 2 emails ( sent to my new email address)  directly in Apple Mail yesterday. One form Zoho (Welcome mail) and one from my old email address (to test). Since then mails sent to my new email address arrive almost instantly in Zoho Webmail but do not come in my Apple Mail.

What can I do to fix this problem?

Thanks for your help!

Elodie