(Swift 3,4,5...) 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 Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // 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.
    let mailman = CkoMailMan()!

    // Set the SMTP server.
    mailman.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.
    let cert1 = CkoCert()!
    var success: Bool = cert1.load(fromFile: "recipient1.cer")
    if success != true {
        print("\(cert1.lastErrorText!)")
        return
    }

    let cert2 = CkoCert()!
    success = cert2.load(fromFile: "recipient2.cer")
    if success != true {
        print("\(cert2.lastErrorText!)")
        return
    }

    let cert3 = CkoCert()!
    success = cert3.load(fromFile: "recipient3.cer")
    if success != true {
        print("\(cert3.lastErrorText!)")
        return
    }

    // Create a new email object
    let email = CkoEmail()!

    email.subject = "This email is encrypted and sent to 3 recipients"
    email.body = "This is an S/MIME encrypted mail sent to 3 recipients"
    email.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 == true {
        success = email.addEncryptCert(cert2)
    }

    if success == true {
        success = email.addEncryptCert(cert3)
    }

    if success != true {
        print("\(email.lastErrorText!)")
        return
    }

    // Add 3 recipients to the email (2 TO addresses, and 1 CC address)
    success = email.add(to: "Recipient 1", emailAddress: "admin@cknotes.com")
    success = email.add(to: "Recipient 2", emailAddress: "somebody001122@yahoo.com")
    success = email.addCC("Recipient 3", emailAddress: "somebody123xyz@gmail.com")

    // Indicate that the email is to be sent encrypted.
    email.sendEncrypted = true

    // Send the encrypted email...
    success = mailman.send(email)
    if success != true {
        print("\(mailman.lastErrorText!)")
    }
    else {
        print("Encrypted Email Sent!")
    }


}