One of the mboxes on my site isn't working, and when I look at the response, there is an auto generated comment that says:
/* no display - blocked mbox */
What causes this, and what does it mean?
Other mboxes on the same page are working, it just this particular one, but I can't see anything different about the configuration, or the content we are trying to send.
Just figured out that the mbox had been de-activated in Test&Target Classic.