ietf-nntp BCP for RFC977 server/RFC1036 interaction

[Rich Salz]

>Umm.. what's wrong with:
>
>	NNTP-Posting-Host: <hostname> [ " " <ipaddress> ]

You answered your questions yourself:

>the only remaining issue is if the particular server is unable, or
>unwilling, to produce a DNS name from an IP address.

But simplifying to
	NNTP-Posting-Host: <name1> [ " " <name2> ]
where either name can be dotted-quad is okay.