TK> Nothing special, when ipv4-only mailer (binkd/os2) tries to call you, it   
    TK> calls to "f5006.n280.z2.binkp.net" and the proxy will choose how to   
    TK> connect. Ipv6 preferred. ;)   
      
      That's fine. As you probably know, I've managed to fix that (partly thanks   
   to you) with relay6.   
      
      But what about *your* mailer calling *out* ?   
      
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