SMTP using HTTP Proxy

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

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CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    --  The mailman object is used for sending and receiving email.
    DECLARE @mailman int
    EXEC @hr = sp_OACreate 'Chilkat.MailMan2', @mailman OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    --  Any string argument automatically begins the 30-day trial.
    DECLARE @success int

    EXEC sp_OAMethod @mailman, 'UnlockComponent', @success OUT, '30-day trial'
    IF @success <> 1
      BEGIN
        PRINT 'Component unlock failed'
        RETURN
      END

    --  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.
    EXEC sp_OASetProperty @mailman, 'HttpProxyHostname', 'www.my-http-proxy.com'
    EXEC sp_OASetProperty @mailman, 'HttpProxyPort', 3128

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

    --  Set the SMTP server.
    EXEC sp_OASetProperty @mailman, 'SmtpHost', 'smtp.chilkatsoft.com'

    --  Set the SMTP login/password (if required)
    EXEC sp_OASetProperty @mailman, 'SmtpUsername', 'myUsername'
    EXEC sp_OASetProperty @mailman, 'SmtpPassword', 'myPassword'

    --  Create a new email object
    DECLARE @email int
    EXEC @hr = sp_OACreate 'Chilkat.Email2', @email OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OASetProperty @email, 'Subject', 'This is a test'
    EXEC sp_OASetProperty @email, 'Body', 'This is a test'
    EXEC sp_OASetProperty @email, 'From', 'Chilkat Support <support@chilkatsoft.com>'
    EXEC sp_OAMethod @email, 'AddTo', NULL, '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.
    EXEC sp_OAMethod @mailman, 'SendEmail', @success OUT, @email
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        RETURN
      END

    --  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:
    EXEC sp_OAMethod @mailman, 'CloseSmtpConnection', @success OUT
    IF @success <> 1
      BEGIN
        PRINT 'Connection to SMTP server not closed cleanly.'
      END

    PRINT 'Mail Sent!'
END
GO