All messages getting marked as Spam

[Sumit Bhattacharjee]

Hello All,
 
I have been using MailScanner for several months now and it has been working
very well.  However, since yesterday, almost all inbound messages are
getting marked marked as Spam.  I have the SpamAssassin threshold set to 6
(default I believe), and following are a couple of examples of the spam
report (email from different domains/IP's):
 
X-cospringsitcom-MailScanner-SpamCheck: spam, SpamAssassin (not cached,
 score=7.983, required 6, FREEMAIL_FROM 0.00, HTML_MESSAGE 0.00,
 MIME_QP_LONG_LINE 0.00, RCVD_IN_DNSWL_NONE -0.00,
 T_TO_NO_BRKTS_FREEMAIL 0.01, URIBL_BLACK 1.77, URIBL_RED 0.00,
 URIBL_RHS_DOB 0.28, URIBL_SEM_FRESH 0.81, URIBL_SEM_FRESH_10 1.01,
 URIBL_SEM_FRESH_15 4.10)
X-cospringsitcom-MailScanner-SpamScore: 7
 
X-cospringsitcom-MailScanner-SpamCheck: spam, SpamAssassin (not cached,
 score=9.235, required 6, HTML_MESSAGE 0.00, RCVD_IN_DNSWL_NONE -0.00,
 URIBL_BLACK 1.77, URIBL_RED 0.00, URIBL_RHS_DOB 0.28, URIBL_SEM 1.26,
 URIBL_SEM_FRESH 0.81, URIBL_SEM_FRESH_10 1.01,
 URIBL_SEM_FRESH_15 4.10, URIBL_SEM_RED 0.00)
X-cospringsitcom-MailScanner-SpamScore: 9

The commonality that I am seeing is that the URIBL_BLACK  is 1.77 for almost
all messages and URIBL_SEM_FRESH_15 is 4.10.  But I am not sure what has
changed (nothing should have).
 
I'd much appreciate any debugging steps recommended by experts on this list.
 
Regards,
Sumit Bhattacharjee

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