[Exim] Testing vacation filters

Some of our users complained about unsuccessful tests of their vacation filters
when they sent the test mails from their own mailboxes.

I think this is because of the line

"$header_from: does not contain $local_part@$domain and",

that is contained in the "personal" condition.

Is there a way around this? We consider writing a web form for sending test
mails from postmaster with reply-to to the user. Can you think of a more
elegant way to solve the problem?

Our vacation filters look this way:
------------------------------------------------------------------
# Exim Filter

if personal alias someAlias@???
            alias otherAlias@???
  then
    mail file theUser.vacation.msg
      once theUser.vacation
  from theUser@???
       subject "vacation/autoreply"
endif
------------------------------------------------------------------

Kind regards
Bruno Daniel