Skye Poier <spoier@???> writes:
> 1. Our customers are complaining about not being able to mail addresses at
> hempseed.com .. the error generated immediately is:
>
[...]
>
> So I looked up the MX records:
>
> % host -t mx hempseed.com
> hempseed.com MX 200 199.97.97.62
> hempseed.com MX 100 199.97.97.238
>
> Which, before today anyway, would accept port 25 connections. Is it
> illegal to specify an IP as a mail exchanger?
Definitely. [Or to be pedantic, in that context 199.97.97.62. is to be treated
as a <domain-name>, and there is no such domain as "62.".] See RFC 1035 section
3.3.9 (MX RDATA format).
Message cc'd to knight@??? [hempseed.com->SOA.rname].
Chris Thompson Cambridge University Computing Service,
Email: cet1@??? New Museums Site, Cambridge CB2 3QG,
Phone: +44 1223 334715 United Kingdom.
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