Holds reference to collection of currently connected users.

A SmtpUsers object.  

object.Users

The Users Property syntax has these parts:

If you want to access information about users currently connected to your Smtp server, you will use this property. In 'technical' words, it will give you pointer to SmtpUsers object, but this means much more.

First, you will be able to determine total number of connected users using Count property.

Second, you will be able to access information about specific user using his index and Item property. For instance, you can see hostname of computer from where first user connected, you can do it like this:

Debug.Print Smtp.Users.Item(0).HostName 

or shorter

Debug.Print Smtp.Users(0).HostName

This is readonly property, and it has only members for accessing existing objects (users), not adding new ones. This is so that Smtp server adds new users as they arrive (and removes them).