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1.
an e-mail message in which the sender refers to an attachment that has not, in fact, been attached. (Thus subscribing to the zen doctrine of non-attachment).
"Oops -- here's the PDF I promised, with apologies for my previous zenmail."
by Jehosophat February 25, 2009

Words related to zenmail

attachment doctrine e-mail mistake zen
 
2.
1) An e-mail with no message text or subject line.

2) An e-mail response with no message text.
"I clicked 'SEND' without thinking and only sent some zen mail."
by Ken Bergenham January 27, 2004