It is email as a support channel. Mail sent to your support address becomes a conversation in ZChat, threaded, attributed to the sender, and answerable with the reply-by-email action your agents already use.
It is not full omnichannel. Email is ZChat's first channel beyond the website widget. It does not add WhatsApp, SMS, Facebook, Instagram, or other social channels. If those are essential to your team, a product built around them will serve you better today - we'd rather tell you that than have you find out after installing.
It is not a mailbox poller. ZChat doesn't hold your mail credentials or log in to check for new messages. Your mail server - Postfix, Exim, an internal relay, whatever you already run - passes the message to ZChat when it arrives.