Why not use CGI and pull the names using param?

In the abscence of that:

for my $cnt (1 .. 5)
   {
     if ( eval "\$fmail$cnt" ne "")
      {
         open(MAIL,"| $sendmail") or die "Can't open sendmail $!";
         print MAIL "To: ", eval "\$fmail$cnt", "\n";
         print MAIL "From: $email\n";
         print MAIL "Subject: Refer A Friend\n";
         print MAIL "Dear ", eval "\$fname$cnt", ",\n\n";
         print MAIL "Your friend, $name at $email, visited out site re
+cently and thought you would b
+e interested..\n\n";
         print MAIL "This is NOT spam. This email was sent by someone 
+who said they knew you.  Your 
+email address is not stored in any databases and will not 

be sold or given to anyone at any time.  This is the only time you wil
+l receive an email from us.";
         close(MAIL);
      }

   }
[download]

(untested)
and (hopefully) before Corion can get to it: this is open to spam attack. Make sure to strip out newlines from your params.

Updated it to work - but this is evil and dangerous and I don't recommend it and I'm not offering you yak urine I swear. Use CGI