Yes, your assumptions are correct. Normally, they should not be forwarded to you (and probably every other lcient connected to the one forwarding these messages).

Why is this? Who knows... my guess is that there are indeed a number of defective clients out there. I even see clients who don't even send a User-Agent clause in their connection string. This makes it really difficult to track down the defective client.

Normally, your application shouldn't be able to work (at least it shouldn't gather any information). Unfortunatly, some clients perfere to forward an unroutable message to all clients rather than dropping it.