The mailing list for listmasters using Sympa

[address@concealed]

In our organization we would like to be able to check to see that the email
coming in from address@concealed is really originating from the wisc.edu mail
server.  We were trying to use the remote_host and remote_addr since we knew
the servers that the authentic emails would have to come from.  But after
reading this thread it looks as if that won't work without us editing the
sympa.pl a bit.  Is this correct?