(Perl) Send Encrypted Email to Multiple Recipients

Demonstrates how to create and send an S/MIME encrypted email to multiple recipients. The digital certificate of each recipient is required. The encrypting/sending process uses each recipient's digital certificate (which internally contains the public key). Each recipient decrypts the received email using his/her private key.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# The mailman object is used for sending and receiving email.
$mailman = chilkat::CkMailMan->new();

# Set the SMTP server.
$mailman->put_SmtpHost("smtp.mymailserver.com");

# Load each recipient's certificate into a Chilkat certificate object.
# This example loads the certificates from files.  However, the Chilkat
# certificate object provides other means for loading certificates,
# such as from in-memory PEM strings, or in-memory binary DER encoded form, etc.
$cert1 = chilkat::CkCert->new();
$success = $cert1->LoadFromFile("recipient1.cer");
if ($success != 1) {
    print $cert1->lastErrorText() . "\r\n";
    exit;
}

$cert2 = chilkat::CkCert->new();
$success = $cert2->LoadFromFile("recipient2.cer");
if ($success != 1) {
    print $cert2->lastErrorText() . "\r\n";
    exit;
}

$cert3 = chilkat::CkCert->new();
$success = $cert3->LoadFromFile("recipient3.cer");
if ($success != 1) {
    print $cert3->lastErrorText() . "\r\n";
    exit;
}

# Create a new email object
$email = chilkat::CkEmail->new();

$email->put_Subject("This email is encrypted and sent to 3 recipients");
$email->put_Body("This is an S/MIME encrypted mail sent to 3 recipients");
$email->put_From('Chilkat Support <support@chilkatsoft.com>');

# Make each of the certificates available for encrypting the email
# by calling AddEncryptCert for each.
$success = $email->AddEncryptCert($cert1);
if ($success == 1) {
    $success = $email->AddEncryptCert($cert2);
}

if ($success == 1) {
    $success = $email->AddEncryptCert($cert3);
}

if ($success != 1) {
    print $email->lastErrorText() . "\r\n";
    exit;
}

# Add 3 recipients to the email (2 TO addresses, and 1 CC address)
$success = $email->AddTo("Recipient 1",'admin@cknotes.com');
$success = $email->AddTo("Recipient 2",'somebody001122@yahoo.com');
$success = $email->AddCC("Recipient 3",'somebody123xyz@gmail.com');

# Indicate that the email is to be sent encrypted.
$email->put_SendEncrypted(1);

# Send the encrypted email...
$success = $mailman->SendEmail($email);
if ($success != 1) {
    print $mailman->lastErrorText() . "\r\n";
}
else {
    print "Encrypted Email Sent!" . "\r\n";
}