Yep, looke like they moved servers and/or hosting providers and are probably trying to get things working on the new host...
Got DNS list for 'the6mmshop.com' from K.GTLD-SERVERS.NET
Found NS record: ns1.riverbirch.net[24.75.105.103], was resolved to IP address by K.GTLD-SERVERS.NET
Found NS record: ns2.riverbirch.net[24.75.105.104], was resolved to IP address by K.GTLD-SERVERS.NET
Domain has 2 DNS server(s)
DNS server ns1.riverbirch.net[24.75.105.103] is alive and authoritative for domain the6mmshop.com
DNS server ns2.riverbirch.net[24.75.105.104] is alive and authoritative for domain the6mmshop.com
2 server(s) are alive
Master DNS defined by SOA (ns1.lcmail.net) was not found among NS records.
All 2 your servers have the same zone version 2004011305
Checking HTTP server
www.the6mmshop.com [66.51.164.96]
HTTP server
www.the6mmshop.com[66.51.164.96] answers on port 80
Received: HTTP/1.1 200 OK (Server: Microsoft-IIS/6.0) . The 6mm Shop | Temporary Downtime. T E M P O R A R Y O U T A G E. The 6mm Shop is currently experiencing technical difficulties and will be .temporarily unavailable for processing orders. We expect to have services .returned by the following business day and want to thank everyone for their .patience and continued support as we work
Domain the6mmshop.com has only one mail-server
Checking mail server (PRI=10) mail.paconline.net [66.51.160.60]
Mail server mail.paconline.net[66.51.160.60] answers on port 25
<<< 220 paconline.net ESMTP Pacific Online NO UCE
>>> HELO paco
<<< 250 paconline.net is pleased to meet you
>>> MAIL FROM: <dnscheck@paco.paco>
<<< 250
postmaster@the6mmshop.com unknown user account
>>> RCPT TO: <root@the6mmshop.com>
<<< 550
info@the6mmshop.com unknown user account
>>> RCPT TO: <webmaster@the6mmshop.com>
<<< 250
webmaster@the6mmshop.com will leave the Internet
>>> QUIT
Mail server mail.paconline.net [66.51.160.60] accepts mail for the6mmshop.com