On 2018 Jun 19 11:31:08, you wrote to me:   
      
    >> my point is specifically that messages with a ^aRESCANNED control line   
    >> should  not be passed on to other links... ever... that will stop them   
    >> from triggering  what looks like a regurge or "dupe dump"... they will   
    >> be different than the  original message because of the ^aRESCANNED   
    >> control line so they will not be  caught by most dupe detection   
    >> techniques... that's the real problem...   
      
    RS> Is that true?   
      
   in numerous cases, yes... but, if i want a rescan of an area that had damaged   
   data files and i'm trying to recover the last year's messages, why should the   
   rescanned messages be sent on to any other system? mine is the only one that   
   wants or needs them... why should other linked systems have to do the   
   additional work? if we just don't send ^aRESCANNED messages on to other   
   systems, no other systems would be bothered...   
      
    RS>  Synchronet/SBBSecho uses 2 methods of dupe messge detection:   
      
    RS> 1. Message-ID (in the case of FTN, that's everything between "\1MSGID: "   
    RS> and   
    RS>    the CR) - the Message-ID doesn't change when messages a re-scanned   
    RS> 2. Message body text (not including kludge/control lines, paths/seen-bys,   
    RS>    and tear/tag/origin lines)   
      
    RS> Rescanned messages would (should) be caught as dupes just fine.   
      
   that looks ok but not everyone goes that route with their dupe detection   
   code...   
      
   i've seen the second one cause systems to only see, for example, the first   
   monthly posting of something and they never see it again in any of the   
   following months... then it is purged out of their message base and they don't   
   have it any more and don't receive it either... maybe it is echo rules...   
   maybe it is a monthly PSA...   
      
   )\/(ark   
      
   Always Mount a Scratch Monkey   
   Do you manage your own servers? If you are not running an IDS/IPS yer doin' it   
   wrong...   
   ... Every artist is a cannibal, every poet a thief.   
   ---   
    * Origin:  (1:3634/12.73)