but when responding to emails from each of these addresses from that one central inbox, we need to ensure that they are delivered to the recipient using the relevant email address and associated business footer.
This video tutorial shows you how to set up an alias email account in your one central email account. I have several email accounts feeding to one since I wish to only log in to 1 account.
If you need additional help to above video tutorial, contact Google support via your Google business app account. They have great chat session help, I have used it several times.
Yes. You can add sender accounts in Gmail, so that when a message is directed to an address, you respond with that corresponding address. You can have signatures for those addresses, as well. Google “adding sender accounts to gmail”.