does email officially identify carrier-added crap?

[Robert P. J. Day]

  since i normally torture my local (KW)LUG with questions, i figured
i'd entertain TLUG this time.

  is there an official standard that dictates how email
senders/carriers must identify the self-promotional rubbish they add
to messages?  as in, "this message sent from my blackberry" --
annoying nonsense like that.

  do any standards for email or MIME require that such additional
verbiage be clearly identifiable?  thanks.

rday
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Robert P. J. Day                               Waterloo, Ontario, CANADA

            Linux Consulting, Training and Kernel Pedantry.

Web page:                                          http://crashcourse.ca
Twitter:                                       http://twitter.com/rpjday
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