收到不明邮件!求高手来解答我收到的英文邮件!但是发件人是@yahoo.cn结尾的!是不是恶作剧?

收到不明邮件!求高手来解答我收到的英文邮件!但是发件人是@yahoo.cn结尾的!是不是恶作剧?
这是邮件的内容：
GROUP MANAGING DIRECTOR
Fed Ex Express
FED-EX DELIVERY NOTIFICATION
Attention:Valued Customer
This is to put to your notice that we are still waiting the payment for the security keeping fee which you are to provide for before we can get your parcel delivered to you.
Note that the more you delay the payment the more the fee increases so therefore you are advice to send the $100usd today so that our delivery man can get your package delivered to you in the next 24hours without any delay.
You are to make this payment either via WESTERN UNION or MONEY GRAM with the payment details below,to enable us commence on the delivery of your parcel tomorrow.
PAYMENT INFORMATION (WESTERN UNION MONEY TRANSFER).
RECIEVERS NAME:DAVID KELVIN
COUNTRY:NIGERIA
CITY:LAGOS
QUESTION:WHAT DAY?
ANSWER:TODAY.
PAYMENT DETAILS TO SEND TO US
Money Transfer Control Number (MTCN)
Senders Name
Senders address.
MODE OF DIPLOMATIC DELIVERY.
As soon as we Receive the security keeping fee,Our international Diplomat agent will depart Nigeria with your CONSIGNMENT and your Shipment Airway bill will be sent to you immediately to track your Cargo to your given address within 24Hours.Our Diplomat agent will call you on arrival to your country to hand over your parcel to you.
Treat as urgent,Call us on +234-802-075-2155
MR.LEVIS MARC
(FOREIGN DELIVERY DEPARTMENT FEDEX NIGERIA)
FEDEX COURIER COMPANY LTD,
Regulated by the Delivery Services Authority
Company:FedEx Express
Telephone:+234-802 -075 -2155
Service Available:Export/Import
Monday to Friday:0800-1800 Office Hours
Saturday and Sunday:1000-1400
Public Holidays:1000-1400 Monday to Friday:0800-1800.
Fed Ex Express
"The World on time"