The Messages feature allows the host and clients to send messages to each other without revealing their email addresses. Both the host and the client can start a conversation.
Messages by host
When you, the host, want to inform your client of something, you can either reply to one of the emails NeetoCal sends regarding the meeting or you can use the messages tab to send them a message. In both cases, the client receives an email. The client could only see your name and not your email ID. This is done to protect the privacy of the host.
Messages by client
When you, the client, want to initiate a conversation with the host, you can do so by replying to one of the emails that NeetoCal sends regarding the meeting. You can then continue this conversation by replying to the emails or by using the messages tab.