AOL helping scammers hide their email addresses

The following emails are the exact same but the first one is how AOL users see it as it comes to their in box. The sender’s email address is hidden and You have to remember to show that address if You want to see who it is coming from. Why would AOL want to hide the address of the person sending you an email? Notice that the first one says it is coming from “payment center” instead of a very bogus and obvious scam address that is actually where it is coming from in the second screen shot below the first one.

hidden senders email in aol
Who is AOL protecting by hiding the senders email?
hidden email address in aol
Showing the email address

full text of the email scam:

Our Ref: UNO
/SNT/STB
==============================================================================
Attn:
Beneficiary ,

WORLD BANK GROUP AND UNITED NATION ORGANIZATION do hereby give
this irrevocable approval order with Release Code: GNC/3480/02/15 BATCH “A”
Payment in your favor for your contract entitlement/award winning payment with
the UNITED NATION to your nominated bank account. Now your new Payment, United
Nation Approval No: UN5685P, White House Approved No: WH44CV, Reference
No.-35460021, Allocation No: 674632 Password No: 339331, Pin Code No:
55674.

As a matter of fact, you are required to deal and Communicate only
with MR ANDY JOHNSON, DIRECTOR INTERNATIONAL REMITTANCE CITIBANK LONDON, UNITED
KINGDOM, for your UN Payment grant valued $8.3m. So contact: MR ANDY JOHNSON on
his contact information, Tel/Fax Number: +447 087 693 411, Email: (
citibgroups2@aol.de ) You are required to send bellow information for your
transfer.

(1) YOUR FULL NAME:
(2) ADDRESS, CITY, STATE AND COUNTRY:
(3)
PHONE, FAX AND MOBILE:
(4) COMPANY NAME (IF ANY) POSITION AND ADDRESS:
(5)
BANK DETAILS: ( BANK NAME, BANK ADDRESS, ACCOUNT & ROUTING NUMBER )
(6)
PROFESSION, AGE AND MARITAL STATUS:
(7) COPY OF YOUR INT’L PASSPORT/DRIVERS
LICENSE:

You have to do this as soon as you receive this message. There is
time limited time given.

SIR FREDRICKSON MCCAULEY.
(CHAIRMAN COMMITTEE ON
FOREIGN CONTRACT/AWARD WINING PAYMENT UNITED
NATION AND USA GOVERNMENT).