I think what you asked for can be done by working directly against the database. 

This is the theory (step 1 and 2 are performed by the SQL script below - you will need to do step 2a, then step #3 and then step #4c).

1. We create a new table called "My_AutoBL", which will contain all the From/To email addresses for the emails that the end users have marked for deletion

2. We then create a new stored procedure called "PurgeQuarantineAndAutoBL" that then should be.....

a.  ...scheduled to be executed via the SQL Server Agent every 10 minutes (simply schedule to execute the SQL command "EXEC PurgeQuarantineAndAutoBL")

3. The automatic database cleanup that SpamFilter performs to remove old entries in the database should be disabled by entering "0" in SpamFilter's database tab, specifically under "Enter the interval in minutes for when the expired emails are deleted from the quarantine database".

4. The stored procedure "PurgeQuarantineAndAutoBL" will perform the following tasks:

a. When a user marks a quarantined email for deletion, it will add the From/To email address to the My_AutoBL table

b. It will remove from the tblQuarantine table all records where the From/To addresses match entries in the My_AutoBL table, which will prevent all entries users have opted to permanently delete from appearing in their spam list

c. It will perform the "standard" database cleanup by removing all archived emails older than a preset number of days (7 by default, please see comments in the stored procedure to modify this).

Please let us know if this works out for you.

This script can be also downloaded from:

www.logsat.com/spamfilter/pub/CreateMyAutoBL.zip

-- Create My_AutoBL Auto-Blacklist Accessory table

CREATE TABLE [dbo].[My_AutoBL](

[ID] [int] IDENTITY(1,1) NOT NULL,

[EmailFrom] [nvarchar](100) NOT NULL,

[EmailTo] [nvarchar](100) NOT NULL,

 CONSTRAINT [PK_My_AutoBL] PRIMARY KEY CLUSTERED 

(

[ID] ASC

)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

) ON [PRIMARY]

GO

CREATE NONCLUSTERED INDEX [IX_My_AutoBL_EmailFrom] ON [dbo].[My_AutoBL] 

(

[EmailFrom] ASC

)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

GO

CREATE NONCLUSTERED INDEX [IX_My_AutoBL_EmailTo] ON [dbo].[My_AutoBL] 

(

[EmailTo] ASC

)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]

GO

-- Create the stored procedure that handles the addition of entries to the 

-- My_AutoBL automatic blacklist and to perform routine cleanup of the quarantine database

-- replacing the one being performed by SpamFilter

CREATE PROCEDURE [dbo].[PurgeQuarantineAndAutoBL] 

AS

BEGIN

-- SET NOCOUNT ON added to prevent extra result sets from

-- interfering with SELECT statements.

SET NOCOUNT ON;

-- Locate and add to the My_AutoBL table all from/to email addresses that have been marked

-- by users to be deleted

INSERT INTO My_AutoBL (EmailFrom, EmailTo)

SELECT     tblQuarantine.EmailFrom, tblQuarantine.EmailTo

FROM         My_AutoBL RIGHT OUTER JOIN tblQuarantine ON 

My_AutoBL.EmailFrom = tblQuarantine.EmailFrom AND 

My_AutoBL.EmailTo = tblQuarantine.EmailTo

WHERE     (tblQuarantine.Expire = 1) AND (My_AutoBL.ID IS NULL)

-- Now delete all entries in the tblQuarantine that match the to/from email addresses that have been

-- added in the past to the My_AutoBL blacklist.

DELETE FROM tblQuarantine

FROM   My_AutoBL INNER JOIN tblQuarantine ON 

My_AutoBL.EmailFrom = tblQuarantine.EmailFrom AND

My_AutoBL.EmailTo = tblQuarantine.EmailTo

-- Perform routine cleanup for the tblQuarantine by removing all emails older than the specified number

-- of days below (7 by default in the:

-- DATEDIFF(day, MsgDate, GETDATE()) > 7 

-- we are deleting 500 entries at a time to avoid locking rown in the database for too long

SET ROWCOUNT 500

delete_more1:

UPDATE tblQuarantine SET Expire = 1 WHERE (Expire <>1) AND (DATEDIFF(day, MsgDate, GETDATE()) > 7)

IF @@ROWCOUNT > 0 GOTO delete_more1

SET ROWCOUNT 0

SET ROWCOUNT 500

delete_more2:

DELETE FROM tblQuarantine WHERE tblQuarantine.Expire <> 0

IF @@ROWCOUNT > 0 GOTO delete_more2

SET ROWCOUNT 0

SET ROWCOUNT 500

delete_more3:

  DELETE tblMsgs FROM tblMsgs LEFT JOIN tblQuarantine 

ON tblMsgs.MsgID = tblQuarantine.MsgID WHERE (tblQuarantine.MsgID IS NULL)

IF @@ROWCOUNT > 0 GOTO delete_more3

SET ROWCOUNT 0

END