How do I collect mail from more than one POP3 mailbox?

You can easily add a new mail account in the MailCOPA email program by using the Add New Mail Account Wizard found on the wizards menu.

MailCOPA Email Program Wizards Menu

Or you can enter the details directly by going to the Configuration Menu and selecting User/Account Details.  Select Incoming Mail Servers and click on the Add new Mail Server button.  You will also need to tell MailCOPA about any new email addresses you want to support.

There is no limit to the number of POP3 mailboxes you can check, just keep adding more as necessary.