Message ID question/confusion

I’'ve written a bot that connects to my wildfire server. When first connected I get flooded with messages that are already in the chat room that my bot has joined.

Some of those messages have an id= and some don’'t. That is I get some messages of the form

<message id=“V89X1-16” …

and some of the form

<message …

that have no id.

My bot needs to reconnect if disconnection occurs, and in that event I get the same messages shot to me on each reconnection.

I need to detect which messages I’'ve already seen. Does the ‘‘id’’ or lack thereof play a role in this?? I can figure many ways to achieve what I want to do, but if the id where always present that would make it easy and fast.