I know this sounds like a scam

It certainly does and for good reason, regardless of the promise that it is not a scam, it is.

In this email you are advised that you have a large amount of money that is going to be delivered to you, in order for that to happen you will first need to pay fees, after each fee is paid you will be advised that in order to receive your money you will need to pay just one more fee.

Of course, the fees will never stop until you give up on trying to get your money.

Its a scam

From: [email protected]

Sent:
To: Left blank indicating it was sent to multiple recipients

I am Jim Leon, an attorney at law. I discovered your email and information through internet search, I know this sounds like a scam because of lot of activities going on the internet. But I assure you that this is real.
I have contacted you to assist in distributing the money left behind by my client before it is confiscated or declared unserviceable by the bank where this deposit valued at Eighteen million dollars (US$18million dollars) is lodged. This bank has issued me a notice to contact the next of kin, or the account will be confiscated..
Best regards,

Best regards, Jim Leon
Attorney at Law
[email protected]