" You can use the "@filename" directive in resend to move the
command-line options of resend into a file readable only by the
majordomo user/group. This will make it such that you can't find out
the -outgoing address by connecting to your mailer and doing an EXPN
or VRFY, or even locally by looking at the aliases file or NIS map."
What is the "@filename" directive"?
" Another more direct approach is to simply disable EXPN or VRFY
altogether. See the documentation for your mailer on how to do this."
Could someone be more specific about what needs to be done here?