> RFC 2821 Section 4.1.4 Order of Commands > ... > An SMTP server MAY verify that the domain name parameter in the EHLO > command actually corresponds to the IP address of the client. > However, the server MUST NOT refuse to accept a message for this > reason if the verification fails: the information about verification > failure is for logging and tracing only. > ... > > It can mean whatever you like (do note "MAY" and "MUST NOT" though).
It just mean you can't drop a message based solely on the parameter of the EHLO command. You MAY check it, if you like to. But you MUST NOT drop it. > > Paul Shupak > [EMAIL PROTECTED]
