If you post more than 10 messages in a day, you will get a message like this
for each of the extra messages.

Date:         Sun, 13 Apr 1997 21:58:39 -0400
From: "L-Soft list server at MITVMA (1.8c)" <LISTSERV@mitvma.mit.edu>
Subject:      Rejected posting to WRITERS@MITVMA.MIT.EDU
To: yourname here!

The distribution  of your message dated  Sun, 13 Apr 1997  21:57:20 -0400 with
subject  "Re: FILL: Ladeda and folderol"  has been  rejected because  you have
exceeded the daily per-user message limit for the WRITERS list. Other than the
list owner, no  one is allowed to  post more than 10 messages  per day. Please
resend your message at  a later time if you still want it  to be posted to the
list.

------------------------ Rejected message (xx lines) --------------------------

all of the text follows...