(Visual FoxPro) IMAP STARTTLS (Explicit TLS/SSL)

The StartTls property is set to force the Connect method to automatically convert an connection to TLS/SSL via the STARTTLS IMAP command.

This is also known as "explicit TLS/SSL" as opposed to "implicit TLS/SSL". With implicit TLS/SSL, the IMAP client connects on the well-known IMAP TLS/SSL port 993 and the secure channel is immediately established. With explicit TLS/SSL, the IMAP client connects on the typical non-secure port (143 usually) and the converts the connection via the STARTTLS command.

Note: This example requires Chilkat v11.0.0 or greater.

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LOCAL lnSuccess
LOCAL loImap
LOCAL lnFetchUids
LOCAL loMessageSet
LOCAL loBundle
LOCAL lnHeadersOnly
LOCAL loEmail
LOCAL i
LOCAL lnNumEmails

lnSuccess = 0

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

loImap = CreateObject('Chilkat.Imap')

* Indicate that STARTTLS should be used to convert
* to a secure TLS/SSL connection:
loImap.StartTls = 1
loImap.Port = 143

* Connect to an IMAP server and convert the connection
* to TLS/SSL via STARTTLS.
lnSuccess = loImap.Connect("imap.example.com")
IF (lnSuccess = 0) THEN
    ? loImap.LastErrorText
    RELEASE loImap
    CANCEL
ENDIF

* The remainder of this example is the same as for 
* non-TLS/SSL...

* Login
lnSuccess = loImap.Login("myLogin","myPassword")
IF (lnSuccess = 0) THEN
    ? loImap.LastErrorText
    RELEASE loImap
    CANCEL
ENDIF

* Select an IMAP mailbox
lnSuccess = loImap.SelectMailbox("Inbox")
IF (lnSuccess = 0) THEN
    ? loImap.LastErrorText
    RELEASE loImap
    CANCEL
ENDIF

* Get the message IDs of all the emails in the mailbox
lnFetchUids = 1
loMessageSet = CreateObject('Chilkat.MessageSet')
lnSuccess = loImap.QueryMbx("ALL",lnFetchUids,loMessageSet)
IF (lnSuccess = 0) THEN
    ? loImap.LastErrorText
    RELEASE loImap
    RELEASE loMessageSet
    CANCEL
ENDIF

* Fetch the emails into a bundle object:
loBundle = CreateObject('Chilkat.EmailBundle')
lnHeadersOnly = 0
lnSuccess = loImap.FetchMsgSet(lnHeadersOnly,loMessageSet,loBundle)
IF (lnSuccess = 0) THEN
    ? loImap.LastErrorText
    RELEASE loImap
    RELEASE loMessageSet
    RELEASE loBundle
    CANCEL
ENDIF

* Loop over the bundle and display the FROM and SUBJECT of each.
loEmail = CreateObject('Chilkat.Email')
i = 0
lnNumEmails = loBundle.MessageCount
DO WHILE i < lnNumEmails
    loBundle.EmailAt(i,loEmail)

    ? loEmail.From
    ? loEmail.Subject
    ? "--"
    i = i + 1
ENDDO

* Disconnect from the IMAP server.
lnSuccess = loImap.Disconnect()

RELEASE loImap
RELEASE loMessageSet
RELEASE loBundle
RELEASE loEmail