[dspam-users] Unable to find a valid signature

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Hi,

While trying to forward spam to train, encounter error as below:-
@4000000045bd72a837ff2abc delivery 2412: success: 
1278:_[01/29/2007_12:05:50]_Signature_retrieval_for_'62,45bd3954173372051017194'_failed/1278:_[01/29/2007_12:05:50]_Unable_to_find_a_valid_signature._Aborting./1278:_[01/29/2007_12:05:50]_process_message_returned_error_-5.__dropping_message./did_0+0+1/

/var/dspam/log/dspam.debug does not have any clue for me.

I had tried using command via console:-

[EMAIL PROTECTED] dspam --user vpopmail 
global --mode=teft --class=spam --source=error < spam1.eml
1428: [01/29/2007 12:08:08] Unable to find a valid signature. Aborting.
1428: [01/29/2007 12:08:08] process_message returned error -5.  dropping 
message.
1428: [01/29/2007 12:08:08] Unable to find a valid signature. Aborting.
1428: [01/29/2007 12:08:08] process_message returned error -5.  dropping 
message.


any help pls.

thanks