Ok, I can't get an answer from AOL on this, so I'll throw it out here.
 
I have an IMail server running on a cable connection with a dynamically assigned IP (cable company does not offer static).  I have the server setup to use the cable company SMTP server as a gateway in an effort to get around AOL and other ISP blocking of mail from servers on dynamic circuits.  But, this isn't working in the case of AOL or Compuserve.
 
The messages I get back when sending to either AOL or Compuserve users is "550 mailbox not found".  If I send an email to these accounts from a mail client directly through the cable company SMTP server the mail is delivered without a problem.  I also have no problem sending to these accounts from an IMail server on a static circuit.
 
Anyone have any insight as to what kind of mindless filtering AOL is doing to cause this?
 

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