domain.com has a 301 redirect to www.domain.com
The server is very much online and hasn't been offline for a long time now, if I test domain.com Google reports that it's got a redirect to www.domain.com
However when I test "www.domain.com" it reports "Unreachable" and because of this the forum hasn't been indexed at all, it's also unindexed in Yahoo and the other popular search engines.
Does anyone know what could be causing this? Another site running from the same server works fine (indexed). The sites both aren't low traffic (couple of thousand uniques a day) so it's not anything to do with being unworthy of indexing.
Is it possible the site has been flagged as spam, if so would Google report it as "Unreachable"?