SQL Server

Read Delivery-Status Fields from a Bounce

Demonstrates the Chilkat Email.GetDeliveryStatusInfo method, which returns a named field from the message/delivery-status part of a delivery-status notification (DSN). It should be called only for an email identified as a delivery-status notification. This example loads a bounce message and reads its Action, Status, and Final-Recipient fields.

Background: When a message can't be delivered, the mail system returns a bounce as a multipart/report whose message/delivery-status part carries machine-readable fields: Action (e.g. failed), Status (a numeric code like 5.1.1 meaning "no such mailbox"), and Final-Recipient (the address that failed). Parsing these lets a program automatically detect hard bounces and prune bad addresses from a mailing list.

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--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    --  Demonstrates the GetDeliveryStatusInfo method, which returns a field from the
    --  message/delivery-status part of a delivery-status notification (DSN / bounce).
    --  Call it only for an email that is a delivery-status notification.

    DECLARE @email int
    EXEC @hr = sp_OACreate 'Chilkat.Email', @email OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    EXEC sp_OAMethod @email, 'LoadEml', @success OUT, 'qa_data/eml/dsn_bounce.eml'
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @email, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @email
        RETURN
      END

    --  Read individual fields from the message/delivery-status part.

    EXEC sp_OAMethod @email, 'GetDeliveryStatusInfo', @sTmp0 OUT, 'Action'
    PRINT 'Action: ' + @sTmp0

    EXEC sp_OAMethod @email, 'GetDeliveryStatusInfo', @sTmp0 OUT, 'Status'
    PRINT 'Status: ' + @sTmp0

    EXEC sp_OAMethod @email, 'GetDeliveryStatusInfo', @sTmp0 OUT, 'Final-Recipient'
    PRINT 'Final-Recipient: ' + @sTmp0

    --  Note: The path "qa_data/..." is a relative local filesystem path,
    --  relative to the current working directory of the running application.

    EXEC @hr = sp_OADestroy @email


END
GO