How to add a shared email account to the "salesinbox"?

How to add a shared email account to the "salesinbox"?

When we setup email to go to the "salesinbox", it only allows me to create an imap account for my personal work email (fred@abc.com). But we all need to share the customercare@abc.com email also. All of our web requests and client correspondence come into that email address. We then reply using either the sales@abc.com or support@abc.com email addresses so we can track sales and support questions. I need to be able to reply to an email and then change my "from" address so that the thread stays stays together.

As an example, a customer emails "support". It goes to the "customercare" inbox. I reply to the email and change my from address to "support", answer a question and tell them they can get a quote from sales. Sales then jumps in and replies to the same email and changes the from address to "sales". Now the customer emails and our replies are all together in that email thread.

In any case, all mail comes to the customer care email address whether they email that, sales or support. This works perfectly with gmail (which we use as the front end for our abc.com email addresses now). How do we do this with Zoho?