(PureBasic) SMTP using HTTP Proxy

Demonstrates how to communicate with an SMTP server via an HTTP proxy.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkEmail.pb"
IncludeFile "CkMailMan.pb"

Procedure ChilkatExample()

    ; 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.i = CkMailMan::ckCreate()
    If mailman.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; To connect through an HTTP proxy, set the HttpProxyHostname
    ; and HttpProxyPort properties to the hostname (or IP address)
    ; and port of the HTTP proxy.  Typical port numbers used by
    ; HTTP proxy servers are 3128 and 8080.
    CkMailMan::setCkHttpProxyHostname(mailman, "www.my-http-proxy.com")
    CkMailMan::setCkHttpProxyPort(mailman, 3128)

    ; Important:  Your HTTP proxy server must allow non-HTTP
    ; traffic to pass.  Otherwise this does not work.

    ; Set the SMTP server.
    CkMailMan::setCkSmtpHost(mailman, "smtp.chilkatsoft.com")

    ; Set the SMTP login/password (if required)
    CkMailMan::setCkSmtpUsername(mailman, "myUsername")
    CkMailMan::setCkSmtpPassword(mailman, "myPassword")

    ; Create a new email object
    email.i = CkEmail::ckCreate()
    If email.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkEmail::setCkSubject(email, "This is a test")
    CkEmail::setCkBody(email, "This is a test")
    CkEmail::setCkFrom(email, "Chilkat Support <support@chilkatsoft.com>")
    success.i = CkEmail::ckAddTo(email,"Chilkat Admin","admin@chilkatsoft.com")

    ; Call SendEmail to connect to the SMTP server via the HTTP proxy and send.
    ; The connection (i.e. session) to the SMTP server remains
    ; open so that subsequent SendEmail calls may use the
    ; same connection.  
    success = CkMailMan::ckSendEmail(mailman,email)
    If success <> 1
        Debug CkMailMan::ckLastErrorText(mailman)
        CkMailMan::ckDispose(mailman)
        CkEmail::ckDispose(email)
        ProcedureReturn
    EndIf

    ; Some SMTP servers do not actually send the email until 
    ; the connection is closed.  In these cases, it is necessary to
    ; call CloseSmtpConnection for the mail to be  sent.  
    ; Most SMTP servers send the email immediately, and it is 
    ; not required to close the connection.  We'll close it here
    ; for the example:
    success = CkMailMan::ckCloseSmtpConnection(mailman)
    If success <> 1
        Debug "Connection to SMTP server not closed cleanly."
    EndIf

    Debug "Mail Sent!"


    CkMailMan::ckDispose(mailman)
    CkEmail::ckDispose(email)


    ProcedureReturn
EndProcedure