XPost: alt.comp.software.thunderbird   
   From: address@is.invalid   
      
   Mr. Man-wai Chang,   
      
   > ISPs are trying to prevent non-business customers from running their own   
   > SMTP server (TCP port 25) to spam the world.   
      
   I'm not sure how blocking that port would block spamming, as using the   
   equivalent SSL port for it would also work.   
      
   AFAICT the usage of SSL connections has the same reason as always : snooping   
   gets harder (for one, the users authentication cannot be sniffed anymore).   
      
   Though I did hear, long ago, that some ISPs routed the SMTP port connections   
   (standard and SSL) only to their own email servers.  For the reason you   
   described.   
      
   Regards,   
   Rudy Wieser   
      
   --- SoupGate-Win32 v1.05   
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