(SQL Server) Download POP3 Email using UIDLs

Demonstrates how to download POP3 email by first getting the complete set of UIDLs and then downloading email by calling FetchEmail for each UIDL. This is equivalent to calling CopyMail, except your application can process each email as it arrives instead of waiting for the entire bundle to be downloaded. Also, it's better protection against potential out-of-memory issues if your mailbox has a very large number of messages. There is no performance difference between fetching emails individually vs. calling CopyMail.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- This example requires the Chilkat API to have been previously unlocked.
    -- See Global Unlock Sample for sample code.

    -- The mailman object is used for receiving (POP3) 
    -- and sending (SMTP) email.
    DECLARE @mailman int
    -- Use "Chilkat_9_5_0.MailMan" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.MailMan', @mailman OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Set the POP3 server's hostname
    EXEC sp_OASetProperty @mailman, 'MailHost', 'pop.someMailServer.com'

    -- Set the POP3 login/password.
    EXEC sp_OASetProperty @mailman, 'PopUsername', 'myLogin'
    EXEC sp_OASetProperty @mailman, 'PopPassword', 'myPassword'

    DECLARE @sa int
    EXEC sp_OAMethod @mailman, 'GetUidls', @sa OUT
    EXEC sp_OAGetProperty @mailman, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @mailman
        RETURN
      END
    DECLARE @i int
    SELECT @i = 0
    DECLARE @n int
    EXEC sp_OAGetProperty @sa, 'Count', @n OUT

    DECLARE @uidl nvarchar(4000)

    WHILE @i < @n
      BEGIN

        EXEC sp_OAMethod @sa, 'GetString', @uidl OUT, @i

        DECLARE @email int
        EXEC sp_OAMethod @mailman, 'FetchEmail', @email OUT, @uidl
        EXEC sp_OAGetProperty @mailman, 'LastMethodSuccess', @iTmp0 OUT
        IF @iTmp0 <> 1
          BEGIN
            EXEC sp_OAGetProperty @mailman, 'LastErrorText', @sTmp0 OUT
            PRINT @sTmp0
            EXEC @hr = sp_OADestroy @sa

            EXEC @hr = sp_OADestroy @mailman
            RETURN
          END

        EXEC sp_OAGetProperty @email, 'From', @sTmp0 OUT
        PRINT 'From: ' + @sTmp0

        EXEC sp_OAGetProperty @email, 'Subject', @sTmp0 OUT
        PRINT 'Subject: ' + @sTmp0
        EXEC @hr = sp_OADestroy @email

        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @sa

    DECLARE @success int
    EXEC sp_OAMethod @mailman, 'Pop3EndSession', @success OUT

    EXEC @hr = sp_OADestroy @mailman


END
GO