I have a script using Mail::Mailer module for Perl and when ever I send mail using it, I only pass one word to the "From" variable, yet when the mail comes back it gets an @firewall-mydomain.com appended to it. Eg.) from = testing and when I get the mail back it has From: testing@firewall-mydomain.com Should I put a switch of some type on the ("sendmail") portion of this script?

{
use Mail::Mailer;
use strict;
 my ($to, $from, $subject, $body) = ( @_);
 my $mailer = Mail::Mailer->new("sendmail");
 $mailer->open({
    From    => $from,
    To      => $to,
    Subject => $subject,
});
print $mailer $body;
$mailer->close();
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