VB.NET

IMAP Read Encrypted Email

See more IMAP Examples

Demonstrates how to read encrypted email from an IMAP mailbox.

Reading encrypted email works the same as reading non-encrypted email. If the required certificate and private key are available on the system (e.g., in the macOS Keychain or Windows Certificate Store), Chilkat will automatically locate them, decrypt the email, and handle the process seamlessly.

Information about the original encrypted state of the email is available after it has been downloaded and decrypted.

VB.NET

Dim success As Boolean = False

Dim imap As New Chilkat.Imap

imap.Ssl = True
imap.Port = 993
success = imap.Connect("imap.example2.com")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' We'll get the IMAP email account's password from the Apple Keychain or Windows Credentials Manager.
' See how we originally saved the email credentials to the Keychain here:
' Save Email Credentials in Apple Keychain or Windows Credentials Manager
Dim secrets As New Chilkat.Secrets

' On Windows, this is the Windows Credentials Manager
' On MacOS/iOS, it is the Apple Keychain
secrets.Location = "local_manager"

' Specify the name of the secret.
' service and username are required.
' appName and domain are optional.
' Note: The values are arbitrary and can be anything you want.
Dim json As New Chilkat.JsonObject
json.UpdateString("appName","MyEmailApp")
json.UpdateString("service","IMAP")
json.UpdateString("domain","example2.com")
json.UpdateString("username","jane@example2.com")

Dim password As String = secrets.GetSecretStr(json)
If (secrets.LastMethodSuccess = False) Then
    Debug.WriteLine(secrets.LastErrorText)
    Exit Sub
End If


success = imap.Login("jane@example2.com",password)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' This example: Send Encrypted Email using Certificate in Apple Keychain
' sent an email with the subject "This email is encrypted".
' Let's download an email with the word "encrypted" in the subject.

Dim messageSet As New Chilkat.MessageSet
success = imap.QueryMbx("SUBJECT encrypted",True,messageSet)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


If (messageSet.Count = 0) Then
    Debug.WriteLine("No messages found.")
    Exit Sub
End If


' Reading encrypted email works the same as reading non-encrypted email. 
' If the required certificate and private key are available on the system (e.g., in the macOS Keychain or Windows Certificate Store), 
' Chilkat will automatically locate them, decrypt the email, and handle the process seamlessly.

Dim uid As UInt32 = messageSet.GetId(0)

Dim email As New Chilkat.Email
success = imap.FetchEmail(False,uid,True,email)
If (success = False) Then
    Debug.WriteLine(imap.LastErrorText)
    Exit Sub
End If


' Here we can show if the email was received encrypted, if it was successfully decrypted, and
' which certificate was used to decrypt.
Debug.WriteLine("Email received encrypted: " & email.ReceivedEncrypted)

' Was it successfully decrypted?
Debug.WriteLine("Successfully decrypted: " & email.Decrypted)

' What cert was used to decrypt?
Debug.WriteLine("Encrypted by: " & email.EncryptedBy)
Dim cert As New Chilkat.Cert
success = email.LastDecryptCert(cert)
If (success <> False) Then
    Debug.WriteLine("Certificate DN: " & cert.SubjectDN)
End If


' Show the decrypted email body.
Debug.WriteLine(email.Body)

imap.Disconnect()