Another UK Au Pair/nanny job offer

I noticed the email has undisclosed-recipients in the To: field.

First Message:
Hello Aupair
How are you doing?We are an American couple with two lovely kids that just moved into the United Kingdom.We would love to hire your services as an aupair to our kids.pLS if you are intrested send us an email.
Best Wishes
Frank Colin
For the Family

Second Message:
Hello
I have just received your email, we just moved to the UK, I had to find out from my colleague who is English as regards hiring an au pair from overseas and he just explained how to go about it.i have discussed with my wife and we are ready to hire you.We need someone that will take care of our kids very well,someone that will show them love and affection.Below are details about my family.
About Our Family

We are a couple with 2 kids living here in the UK.The kids are easy going and relaxed they would enjoy someone with lots of
energy and enthusiasm. Having English as a first language is not
required. We only seek an Au pair for basic child care and light
housework. If you accept to take a position with us, you would be paid
the sum of £450 (Four Hundred and Fifty pounds sterling) weekly.
Hence we will do anything that would motivate the intending au pair to
put in the best in taking care of our children.You shall have a private accommodation with furnished sitting room,bedroom, a private bathroom and a fixed land phone and an Internet ready computer.
We will direct our lawyer to send you a contract and invitation letter as we have decided to hire you.
We shall discuss travel arrangements in due course.We hope our conditions will suit you.
Send us an email as regards your acceptance
Best Regards.
Frank For the Family

Header:
Return-Path: <[email protected]>
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DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type:Message-ID; b=UcrrJlJPq1C1H1DZZWWBgXkdXiM955wj6oQ/OUlZLRL+otvEm9BXM6CDfATHX6P7OViiXgjrHoZr3MljYZsgiljr2rrBMpqDZVKYmgOLYyAyDM5dbNIHsLODQQ33BbeXYHGS+P5XkHZgk7Ndr44E/kiSxBsld5FYy53hEqqNckg=;
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Date: Tue, 24 Feb 2009 03:39:40 -0800 (PST)
From: This sender is DomainKeys verified
Frank Colin <[email protected]>
Reply-To: [email protected]
Subject: ABOUT MY FAMILY
To: undisclosed recipients: ;
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="0-1057716188-1235475580=:32953"
Message-ID: <[email protected]>
Content-Length: 3336

The originating IP of this email is 41.217.2.8, which leads to Nigeria.

The scam here will probably be that they need you to pay fees for a work visa and other documentation.

Undisclosed recipients will mean that your email address was place in the BCC field. It is probably there with a few hundred other people's too.

I see..
I'm learning a lot of stuff today.

Thanks sir!

BTW, I received another fraud job offer >.<
Found something similar in fraudwatchers forum