From the time user connects to your server, up to time
you're accessing this property, it will keep (and
regularly increase) total number of bytes uploaded by
connected user. This value can be used for some statistical
or similar purposes.
You can reset this value to 0 at any time, or set it to
any other value at any time. For instance, if you want to
memory total uploaded bytes across all the sessions by the
user, you should store this value to your database when
user disconnects, and then take it back from database and
put to this property when user logs in.
By its specification, POP3 protocol does not expect too
many bytes to be uploaded from the user. Much more data
will be sent to user (message bodies).
BytesUpload
Property
