CkPython

Send Signed Email using PFX File

Demonstrates how to send a signed email using a digital certificate w/ private key stored in a PFX file. CkPython

import sys
import chilkat

success = False

# 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()

# Set the SMTP server.
mailman.put_SmtpHost("smtp.mymailserver.com")

# Create a new email object
email = chilkat.CkEmail()

email.put_Subject("This email is signed")
email.put_Body("This is a digitally signed mail")
email.put_From("Chilkat Admin <admin@chilkatsoft.com>")
success = email.AddTo("Chilkat Support","support@chilkatsoft.com")

# Indicate that the email should be sent signed.
email.put_SendSigned(True)

# Tell the mailman to use a PFX file as a source for locating
# the certificate and private key required for signing.
# The certificate chosen for signing will be the one that
# matches the sender's email address, which also has
# a private key.  All intermediate certs in the chain of 
# authentication, up to and including the root, will
# be included in the signature.
success = mailman.AddPfxSourceFile("/pfx_files/chilkatsoft_secret.pfx","secret")
if (success != True):
    print(mailman.lastErrorText())
    sys.exit()

# Signed email can be sent in two different ways.  
# In a multipart/signed email, the signature is attached as a separate MIME part.
# In an opaque email (signedData) the content of the email is encapsulated within the signature
# and the email is sent as "application/pkcs7-mime". 
# Either should be fine, but some receiving systems might require one or the other..
mailman.put_OpaqueSigning(False)

# Send a signed email.
success = mailman.SendEmail(email)
if (success != True):
    print(mailman.lastErrorText())
else:
    # The LastErrorText property provides information
    # even when successful.
    print(mailman.lastErrorText())
    print("Mail Sent!")