OK, here's a partial success:

#test_mail.pl

use Net::SMTP;
use Net::Cmd;

$smtp = Net::SMTP->new(
        Host => '192.168.55.173',
        Debug => 1,
        );
$smtp -> mail("root\@test-server.my.home");
@good = $smtp -> recipient('good_address@my.home','bad_address@my.home
+',{ SkipBad => 1, Notify => ['FAILURE']});
$mess = $smtp->message();
$smtp -> data();
$smtp -> datasend("TO: good_address@my.home\n");
$smtp -> datasend("TO: bad_address@my.home\n");
$smtp -> datasend("SUBJECT: Test e-mail from root\n");
$smtp -> datasend("\n");
$smtp -> datasend("A test message.\n");
$smtp -> dataend();

print "These addresses went: @good\n";
print "Status of last address: $mess\n";
$smtp -> quit();
[download]

Which outputs the following:

These addresses went: good_address@my.home
Status of last address: 5.1.1 User unknown
[download]

But that only works if the bad address is the last one in the list. (OK, that's fine for some cgi scripts I have that only accept one e-mail address.) But how to get each result dynamically?

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