On Tue, 2 Jun 1998, Tim Patterson wrote:
> not sure, but guessing its the use of an ip instead of
> a domain name.
>
>
> exim 1.62 reports
> x@??? is undeliverable:
> all relevant MX records point to non-existent hosts
>
> nslookup -type=mx lists.boingo.com
>
> Non-authoritative answer:
> lists.boingo.com preference = 50, mail exchanger = 206.159.213.31
You are correct. The actual MX record is
lists.boingo.com. 3600 MX 50 206.159.213.31.
but there is no such domain as 206.159.213.31. This seems to be a common
mistake, as I seem to see one of these every couple of months. The RHS
of an MX record is a domain, not an IP address. Domain names consisting
of digits are perfectly valid...
--
Philip Hazel University Computing Service,
P.Hazel@??? New Museums Site, Cambridge CB2 3QG,
ph10@??? (sic) England. Phone: +44 1223 334714
--
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