From: barmar@alum.mit.edu   
      
   In article ,   
    vjs@calcite.rhyolite.com (Vernon Schryver) wrote:   
      
   > In article ,   
   > Barry Margolin   wrote:   
   >   
   > >Sometimes companies put useless A records on their domain name as an   
   > >anti-spam measure.  I think there are some spambots that send to the A   
   > >record rather than the MX record, so putting 0.0.0.0 or 127.0.0.1 in the   
   > >A record will prevent them from sending to you.   
   >   
   > It will also trigger spam defenses in many SMTP servers (mail   
   > receivers) to refuse mail from domain names that resolve to bogus   
   > IP addresses.  Domains that can't receive a bounce (NDR) shouldn't   
   > be sending any mail.  (Never mind that bounces must be avoided today   
   > to minimize spam backscatter.)   
      
   But if the name has an MX record then it CAN receive a bounce.  The   
   bogus A record is irrelevant, since MX records take precedence.   
      
   --   
   Barry Margolin, barmar@alum.mit.edu   
   Arlington, MA   
   *** PLEASE don't copy me on replies, I'll read them in the group ***   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)