Is this a visa scam?

Hi all
I never applied for a visa nor am I the agent for anyone who has. I don't even live in the US.

Yet I received this (in the weekend...) and it looks surprisingly professional, though IMHO (I'm not a native English speaker) there are a couple of glitches in the e-mail.
If it is a scam, it's well done. Or...did they send it to the wrong e-mail address! Sounds weird. I made a quick search on Google, but I found nothing.

Out of sheer curiosity, is this a scam? Thanks

Begin forwarded message:

From: NVC Inquiry <[email protected]>, <[email protected]>
Date: 27 September 2014 21:19:47 BST
To: "JUMAYEVA, LEYLA D" <[email protected]>, "JUMAYEVA, LEYLA D" <[email protected]>
Cc: <[email protected]>, <[email protected]>
Subject: PRS2013840004 (AIVF FOR NEOPOST DS-1200)

Dear Sir/Madam,

The attached correspondence relates to an immigrant visa referenced on the subject line. This case is being processed by the National Visa Center. Please read the information carefully and follow the instructions.

This message contains confidential information and is intended only for the individual named. If you are not the named addressee, please notify [email protected] immediately by e-mail from your system. E-mail transmission cannot be guaranteed to be secured or error-free as information could be intercepted, corrupted, or contain viruses. The sender therefore does not accept liability for any errors or omissions in the content of this message.

If at any time you wish not to receive correspondence by e-mail you may "Opt Out" by sending a written request to [email protected]. This e-mail is sent by: The U.S. Department of State's National Visa Center, located at 32 Rochester Avenue, Portsmouth NH 03801. Please DO NOT REPLY to this e-mail.

Have you applied for a visa? Without seeing the attached email, all I can tell you is that [email protected] is a legitimate address. I would also be really cautious of attachments, as legitimate-looking emails like this are a very common way to send out viruses.

With that said, though, scammers and other criminals spoof "from" email addresses all the time, and they copy disclaimers and form letters from legitimate sites on a daily basis.

If you post more information on the attached letter here we can probably help you with a more definitive answer.

Or, if you want to verify that you are really hearing from the government and find out what is going on, forward the message to that address and ask to verify the authenticity. Do NOT use the reply button. Instead, type that address into the "To" box as it is the only way to be sure that it is going to the right place.

Please post the complete headers of the email. They will show where the email was sent from (hopefully) and where they are getting replies.