Why does Exim say “all relevant MX records point to non-existent hosts” when MX records point to IP addresses?
A0324: MX records cannot point to IP addresses. They are defined to point to host names, so Exim always interprets them that way. (An IP address is a syntactically valid host name.) The DNS for the domain you are having problems with is misconfigured. Q0325: How can I arrange for mail on my local network to be delivered directly to the relevant hosts, but all other mail to be sent to my ISP’s mail server? The local hosts are all DNS-registered and behave like normal Internet hosts. A0325: Set up a first router to pick off all the domains for your local network. There are several ways you might do this.
