Hallo. Am Samstag, 10. November 2007 schrieb Alessandro Vesely: > > Courier does not check reverse lookup AFAIK and I would not recommand > > checking this. > that is the same recommendation that RFC2821 makes: > 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.
Hum, in RFC2821, this "MUST NOT refuse" seems to belong to forward lookup also. (I think I missed that last time I looked at it.) This is rather confusing, because some lines above, the client "MUST" send a hostname that "is a valid principal host name [...] for its host." If he doesn't, I would say that I can refuse him for breaking RFC2821. cu, Bernd -- Wer nicht zweifelt muss verrückt sein - Sir Peter Ustinov
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