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.

Download Chilkat Python Library

import sys
import chilkat

#  The mailman object is used for sending and receiving email.
mailman = chilkat.CkMailMan()

#  Any string argument automatically begins the 30-day trial.
success = mailman.UnlockComponent("30-day trial")
if (success != True):
    print "Component unlock failed"
    sys.exit()

#  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>")
email.AddTo("Chilkat Support","support@chilkatsoft.com")

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

#  Create an instance of a certificate store object, load a PFX file,
#  locate the certificate we need, and use it for signing.
#  (a PFX file may contain more than one certificate.)
certStore = chilkat.CkCertStore()
#  The 1st argument is the filename, the 2nd arg is the
#  PFX file's password:
success = certStore.LoadPfxFile("chilkatsoft_secret.pfx","secret")
if (success != True):
    print certStore.lastErrorText()
    sys.exit()

cert = certStore.FindCertBySubjectE("admin@chilkatsoft.com")
if (cert == None ):
    print certStore.lastErrorText()
    sys.exit()

#  If a PFX file is known to contain a single certificate,
#  you may load it directly into a Chilkat certificate object.
#  This snippet of source code shows how:
cert2 = chilkat.CkCert()
#  The 1st argument is the filename, the 2nd arg is the
#  PFX file's password:
success = cert2.LoadPfxFile("chilkatsoft_secret.pfx","secret")
if (success != True):
    print cert.lastErrorText()
    sys.exit()

#  This example will use the cert from the certStore...
email.SetSigningCert(cert)

#  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!"