(Chilkat2-Python) Send Encrypted Email with a Selected Algorithm (AES, 3DES, etc.)

Sends an encrypted email using the recipient's digital certificate from a .cer file, and chooses 3DES for the encryption algorithm. (It is also possible to send AES encrypted email w/ 128-bit, 192-bit, or 256-bit encryption simply by setting the Pkcs7CryptAlg and Pkcs7KeyLength properties.)

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import sys
import chilkat2

# 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 = chilkat2.MailMan()

# Set the SMTP server.
mailman.SmtpHost = "smtp.mymailserver.com"

# Load the .cer file into a certificate object.
# When sending S/MIME encrypted email, it is the recipient's
# certificate that is used for encryption.  Only the public key
# is needed to encrypt.  The recipient is the only
# one possessing the private key, and therefore is the only
# one able to decrypt.
cert = chilkat2.Cert()
success = cert.LoadFromFile("cknotes.cer")
if (success != True):
    print(cert.LastErrorText)
    sys.exit()

# Create a new email object
email = chilkat2.Email()

email.Subject = "This email is encrypted"
email.Body = "This is a digitally encrypted mail"
email.From = "Chilkat Support <support@chilkatsoft.com>"
success = email.AddTo("Chilkat Blog","admin@cknotes.com")

# Indicate that the email is to be sent encrypted.
email.SendEncrypted = True

# Specify the certificate to be used for encryption.
success = email.SetEncryptCert(cert)

# If desired, specify the encryption algorithm to be used.
# The Pkcs7CryptAlg property can be set to "aes", "des", "3des", or "rc2"
email.Pkcs7CryptAlg = "3des"

# If desired, set the key length (in bits) for the encryption algorithm:
# The possible values allowed depend on the Pkcs7CryptAlg property. 
# For "aes", the key length may be 128, 192, or 256. 
# For "3des" the key length must be 192. 
# For "des" the key length must be 40. 
# For "rc2" the key length can be 40, 56, 64, or 128.
email.Pkcs7KeyLength = 192

success = mailman.SendEmail(email)
if (success != True):
    print(mailman.LastErrorText)
else:
    print("Mail Sent!")