If I understand you:
you have two emails with different pop addresses?
you’d like both addresses to be polled and come into remedy?
both have different, logins, passwords, mailbox names, and/or servers?
if this is the case you have two options:
forward one account to the other and poll the one account which everything resides in.
or setup both incoming emails to be polled
Yes, I have two emails with different pop addresses, but one is the main e-mail and the other is a generic e-mail withou login and password, for example:
I have an e-mail with the name firstname.lastname@example.org and bmc has an e-mail with the name email@example.com. I have an login and password to access my e-mail account and my login has access in another e-mail account (firstname.lastname@example.org).
Then, I would like to configure my account (email@example.com) as incoming and, when an e-mail was received both in my box and in the other box, receive by that account
So one mailbox is an individual and one is a team mailbox. The team mailbox actually has permissions too, which one would be your login. Because most authentication today works with sessions, you typically only need to login once and thus you may think there is no ID required but I'm sure there is.
With two separate mailboxes, most setup two separate inboxes; The nice thing is that you can setup a different rule for each.
But since your security is exactly the same you can go to the Email Addresses in the advanced configuration for security and use a semi-colon to separate the addresses.
Again, if you wanted to setup a rule in the team mailbox to forward incoming mail to your individual account then you could setup just ONE incoming mailbox to poll.
FYI I'm not sure which version you are using but they are all about the same, you can go to this doc for 8.1 and then on the left select the version that fits you; however there really shouldn't be any difference.