[US] Probably a phishing email but sending address is legit

My wife got this email from a quickbooks email address which seems legit. I am positive this is a scam but why is the sending email address legit?

INVOICE  
For the period ending 2 June 2026

Dear Customer,

Please be advised that your Bitcoin purchase is scheduled to be processed today. A total amount of 1489.99 USD will be automatically charged to your registered payment method to complete the transaction successfully.

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Invoice number: NRTN-01S-X-ERG852
Amount: 1489.99 USD
Payment Method: PayPal Auto Pay
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Please note: Your registered payment method will be charged for the above amount.

Admin- For Support: 1 (***) ***-****

If this purchase wasn't made by you, Contact us to dispute and receive a refund.

Invoice attached

Sincerely,
Billing & Support Team