I’ve anonymised the following, to protect the guilty (note the cc: field):

Date: Wed, 28 Mar 2007 10:39:20 +0200
From: [list admin]
To: Sender <sender@domain>
CC: some-seminar@domain, some-list@other.domain,
        another-list@third.domain,
        list-the-fourth@another.domain, list-v@another.domain
Subject: Re: [some-seminar] March 30, 2007</p>





  Dear sender [sic],







  Please note that it is possible to submit your announcement
  to [our organisation's website], therefore we will ignore your
  email and give you the following information:







  In order to submit your message to our website and also to
  have it distributed through our weekly mailinglist, please
  visit:







  http://[redacted]







  However, your announcement should be related to research &
  teaching programmes within our institute, such as:







  [redacted]







  Sender wrote:
  >Dear all,
  >
  >this is the announcement of this Friday's talk of the Some
  >Seminar seminar series.
  > [details redacted]
  </pre>