On 11/26/18, Wilfred van Velzen pondered and said...   
       
    Wv> On the path you showed, there is a fastecho system on a Zone border,   
    Wv> which has hardcoded seen-by stripping. That's been known for ages, and   
    Wv> nothing to worry about. Dupe detection takes care of it most of the time.   
    Wv>    
      
   Hi all. After a netmail from Nick I've opted to read the thread and join the   
   discussion. I am running Fastecho at 3:770/1 and have been for many years. In   
   my netmail to Nick I picked up a small entry in the docs   
      
   [snip]   
      
           When your system acts  as outbound zonegate you  may need to  strip   
       addressed out-of-zone.  FastEcho  is  capable  to  do  that  simply  by   
       enabling this feature (which is disabled by default). This can be  done   
       by using the flag ZONEGATE  in FEOPT. In any  case FastEcho acts as  an   
       processing EchoMail coming from another zone.   
      
   [snip]   
      
   So my system may well be the culprit? But it was certainly not intentional   
   nor to my knowledge has even been an issue prior. I'm happy to work with   
   folks to try and resolve the problem.    
      
   Best, Paul   
      
   --- Mystic BBS v1.12 A39 2018/04/21 (Windows/32)   
    * Origin: Agency BBS | Dunedin, New Zealand | agency.bbs.nz (3:770/100)