foreach(keys %emails) {
       my ($name, $add1, $add2, $city, $zip, $country) = split(/::/, $
+emails{$_});
                   # Email Subs, special commands
           my $editmes = $message;             # let's not edit $messa
+ge
           $editmes =~ s/\[name\]/$name/g;    #[name] = user name
           $editmes =~ s/\[time\]/$time/g;     #[time] = time sent
           $editmes =~ s/\[unsub\]/$unsub/g;   #[unsub] = unsubscribe 
+email  

           my $editsig = $signature;           # let's not edit $signa
+ture
           $editsig =~ s/\[name\]/$name/g;    #[name] = user name
           $editsig =~ s/\[time\]/$time/g;     #[time] = time sent
           $editsig =~ s/\[unsub\]/$unsub/g;   #[unsub] = unsubscribe 
+email  
           
           my $editsub = $subject;             # let's not edit $subje
+ct
           $editsub =~ s/\[name\]/$name/g;    # [name] = user name    
+  
     
           open( MAIL, "| $sendmail -t" );
           print MAIL "To: $_\n";
           print MAIL "From: $adminmail\n";
           print MAIL "Subject: $editsub\n\n";
           print MAIL "$editmes\n";
            if ($use ne "" && $signature ne "" ) {          
               print MAIL "$editsig\n";
           }
           print MAIL ".\n";
           close(MAIL);        
       }
[download]

The problem with this setup is that, if your mailing list contains a vast quantity of recipients, you put a big load on the system/MTA, for you open a connection for each individual recipient. A "better" way to me, would be the use of one e-mail with the recipients listed in the Bcc field. That would dramastically take some load of the script, for this way, only one connection will be made to $sendmail. The script would be faster too :)

But implementing this Bcc way, would take away the "personalized" e-mails system you implemented (the [name] stuff wouldn't work anymore). It's up to anyone, of course, but I would sacrifice the personal touch over the speed increase and load decrease.

I am interested in your motive that made you write this script though. There are some rather good mailing list programs, such as Majordomo (Perl :), Mailman (Python/C) out there already. Not even mentioning googling.