pop3 username and password for second email address with shopify /zoho

pop3 username and password for second email address with shopify /zoho

A while ago I successfully setup an email address for my shopify store (me@myshop.com)

I've just tried to add another email account (me2@myshop.com) but got very confused. I'm at the steps 6 and 7:
  1.  Provide the POP3 Incoming server name & Port number (Refer to your Email service provider Help/ Support for these details). Zoho Mail supports standard ports 110 and 995 for Incoming server.
  2. Specify the User name and Password for the account, used in your server.
I don't know how to get the username and password or other details. Where would I find this? 

I can't see any help on the Shopify site, and I don't think it's something I've created?

Thanks