Let's say your marketing team has email groups for conversations with customers and with other teams internally. You can put all the marketers under a team in Zoho TeamInbox, and create shared inboxes for every group email address they use. Now they will be able to receive and send messages from these inboxes—all from a single place.  

Users can be members of multiple teams with a definite role (as admin, member, etc.,) in each team. 

Teams help your organization in the following ways: 

• When conversations are separated team-wise, it will be easy for you to focus on specific topics. Also, when you are searching for an important information from a particular thread of conversation, you precisely know where to find it. 
• As you add people to the teams that they belong to, they will receive messages that matter to them and their inboxes will not be cluttered with messages that are irrelevant. However, if you want to include a member of another team in a specific conversation, you can just @mention them in the comments section of the related thread. 
• Users can have different roles in every team. Therefore you can have admins for every team and these team admins can just be members in other teams or the organization. 
• Whenever a new member is added to the team, they will be able to view all the conversations that happened before they joined the team. This will help newcomers understand the context of the messages and quickly get started with their work.
• Contacts lists can be maintained and managed team-wise.