(Chilkat2-Python) POP3 Verify Signed (S/MIME) Email

Demonstrates how to download and verify digitally signed S/MIME email.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

mailman = chilkat2.MailMan()

# Set the POP3 server's hostname
mailman.MailHost = "pop.someMailServer.com"

# Set the POP3 login/password.
mailman.PopUsername = "myLogin"
mailman.PopPassword = "myPassword"

# sa is a CkStringArray
sa = mailman.GetUidls()
if (mailman.LastMethodSuccess == False):
    print(mailman.LastErrorText)
    sys.exit()

i = 0
while i < sa.Count :

    uidl = sa.GetString(i)

    # email is a CkEmail
    email = mailman.FetchEmail(uidl)
    if (mailman.LastMethodSuccess == False):
        print(mailman.LastErrorText)

        sys.exit()

    print(email.From)
    print(email.Subject)

    # The security layers of signed and/or encrypted emails
    # are automatically "unwrapped" when loaded into
    # a Chilkat email object.
    # An application only needs to check to see if an email
    # was received signed or encrypted, and then examine
    # the success/failure.  For example:
    if (email.ReceivedSigned == True):

        print("This email was signed.")

        # Check to see if the signatures were verified.
        if (email.SignaturesValid == True):
            print("Digital signature(s) verified.")
            print("Signer: " + email.SignedBy)

            # The certificate used for signing may be obtained
            # by calling email.GetSignedByCert.

            # cert is a CkCert
            cert = email.GetSignedByCert()
            if (email.LastMethodSuccess == False):
                print("Failed to get signing certificate object.")
            else:
                print("Signing cert: " + cert.SubjectCN)

        else:
            print("Digital signature verification failed.")

    i = i + 1

mailman.Pop3EndSession()