Here's the related server code…

    def securityChecks(self):
        """
        Check that the connection is from the mail gateway
        """
        allowed = config.Scheduling['iMIP']['MailGatewayServer']
        # Get the request IP and map to hostname.
        clientip = self.request.remoteAddr.host
        host, aliases, _ignore_ips = socket.gethostbyaddr(clientip)
        for host in itertools.chain((host, clientip), aliases):
            if host == allowed:
                break
        else:
            log.err("Only %s is allowed to submit internal scheduling requests, not %s" % (allowed, host))
            # TODO: verify this is the right response:
            raise HTTPError(ErrorResponse(
                responsecode.FORBIDDEN,
                (caldav_namespace, "originator-allowed"),
                "Originator server not allowed to send to this server",
            ))

The message you're seeing means your gethostbyaddr(clientip) call is not returning "localhost".  Does your /etc/hosts have a "127.0.0.1  localhost" entry?


On Mar 15, 2013, at 1:58 AM, Fabrizio Regalli <fabreg@gmail.com> wrote:

Hello, 

I have a problem in my iCal: if I schedule a meeting and the recipient accept it, I can't receive the answer. 
The log says: 

2013-03-14 22:54:57+0100 [-] [caldav-8009]  [PooledMemCacheProtocol,client] [twistedcaldav.scheduling.scheduler#error] Only localhost is allowed to submit internal scheduling requests, not 127.0.0.1 
2013-03-14 22:54:57+0100 [-] [mailgateway] 2013-03-14 22:54:57+0100 [AuthorizedHTTPGetter,client] [twistedcaldav.mail#error] Mail gateway failed to inject message <f46d043748df241b7304d7e99270@google.com> (Reason: 403 Forbidden) 

Could someone help me? 

Thanks in advance.
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