| SYNOPSIS | 
#include <libmilter/mfapi.h>
sfsistat (*xxfi_unknown)(
	SMFICTX *ctx,
	const char *arg
);
 
Handle unknown and unimplemented SMTP commands.
 | 
| DESCRIPTION | 
| Called When | 
xxfi_unknown is called when the client uses an SMTP command
that is either unknown or not implemented by the MTA.
 |  
| Default Behavior | 
Do nothing; return SMFIS_CONTINUE. | 
 
 
 | 
|---|
| ARGUMENTS | 
    
    | Argument | Description |  
    | ctx | 
	Opaque context structure.
	 |  
    | arg | 
	SMTP command including all arguments.
	 |  
     
 | 
| SPECIAL RETURN VALUES | 
  | Return value | Description |  
  
     | SMFIS_TEMPFAIL | 
     Reject this command with a temporary error.
      | 
   
  
     | SMFIS_REJECT | 
     Reject this command.
      | 
   
 
 | 
| NOTES |  
The SMTP command will always be rejected by the server,
it is only possible to return a different error code.
 |