this is a program i have that sends a list of people an email. the problem is that when a bogus address is entered, the error message does not bounce back to the sender. 
#!/usr/local/bin/perl
use CGI;
$foo = new CGI;
$recips = $foo->param('recipient');
$realname = $foo->param('realname');
$realemail = $foo->param('realemail');
$mailprog = '/usr/sbin/sendmail';
my $rhost = $ENV{"REMOTE_HOST"} || "unknown";
my $raddr = $ENV{"REMOTE_ADDR"} || "unknown";

@recipients = split("\, ", $recips);

if(defined ($val = $foo->cookie(-name => "sent-mail"))) {
print $foo->header();
print "
<body bgcolor=\"#FFCC00\">
<p align=\"center\"><big><big><strong><font face=\"Arial\">Sorry $real
+name, emails can only be sent once.</font></strong></big></big></p>
</body>";
} else {
foreach $person (@recipients) {
($pname, $pemail) = split("\<", $person);
$pemail =~ s/\>.*//;
$pname =~ s/\s+//;
open(MAIL,"|$mailprog -t");

# use mailer-friendly "x headers"
print MAIL "X-REMOTE_HOST: $rhost\n";
print MAIL "X-REMOTE_ADDR: $raddr\n";

print MAIL "To: $pemail\n";
print MAIL "Reply-To: $pemail\n";
print MAIL "From: $realemail ($realname)\n";
print MAIL "Subject: $pname, interesting site\n\n";

print MAIL "
$pname

message

$realname";

close (MAIL);
}

open(FILE, ">> addresses.txt");
@addresses = <FILE>;
foreach $person (@recipients) {
($pname, $pemail) = split("\<", $person);
$pemail =~ s/\>//;
if($pemail !=~ /\s+\,\s+/) {
print FILE "$pemail\n";
}}
close(FILE);

print $foo->header();
$cookie = $foo->cookie('-name' => "sent-mail", '-value' => "sent");
print "
<body bgcolor=\"#FFCC00\">
<script language=javascript>
alert(\"Thank you for using the reminder service\");
open(\".../blank.html\", target=\"h_window\");
</script>
</body>";
}

[download]

In reply to mail error response by nujersedvl

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.