nastygram /nas'tee-gram/ n. 1. a protocol packet or item of email the
   latter is also called a letterbomb that takes advantage of
   misfeatures or security holes on the target system to do untoward
   things. 2. disapproving mail, esp. from a net.god, pursuant to a
   violation of netiquette or a complaint about failure to correct some
   mail- or news-transmission problem. compare shitogram, mailbomb. 3.
   a status report from an unhappy, and probably picky, customer. "what'd
   corporate say in today's nastygram?" 4. deprecated an error reply by
   mail from a daemon; in particular, a bounce message.


see also:
letterbomb net.god netiquette shitogram mailbomb daemon 
bounce message 

nastygram
     
        /nas'tee-gram/ 1. a protocol packet or item of e-mail the
        latter is also called a letterbomb that takes advantage of
        misfeatures or security holes on the target system to do
        untoward things.
     
        2. disapproving mail, especially from a net.god, pursuant to
        a violation of netiquette or a complaint about failure to
        correct some mail- or news-transmission problem.  compare
        shitogram, mailbomb.
     
        3. a status report from an unhappy, and probably picky,
        customer.  "what did corporate say in today's nastygram?"
     
        4. deprecated an error reply by mail from a daemon; in
        particular, a bounce message.
     
        jargon file
     
     
see also:
letterbomb net.god netiquette shitogram mailbomb daemon 
bounce message jargon file