No. That’s not actually quite right. RT doesn’t respond to incoming
mail with a precendece of bulk. Other than that it continues to act on
it. Setting the precedence header to “bulk” is a pretty widely honored
convention for saying "This email message was generated by a machine,
not a human. If you’re a machine (like a vacation autoresponder), you
don’t want to reply to the sender, as you’re likely to generate a loop.
Not sure if this has been covered yet (I’m a little late to this thread),
but we’ve had several customers call us complaining that then never received
correspondence from us. After some digging, it turns out their spam filters
had interpreted the bulk precedence header as a sure sign that our
correspondence was spam-tastic.
-Darren