I received amemsil saying I needed more storage. Is this from you?

Hello kkielley,

Welcome to Apple Support Communities. 

We understand that you have received an email about your iCloud storage and you want to know if this email was sent by Apple. We are happy to help.

These steps may help. Please use the steps here to identify if the message was sent from Apple: Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

"How to identify fraudulent emails and messages

Scammers try to copy email and text messages from legitimate companies to trick you into giving them your personal information and passwords. These signs can help you identify phishing emails: 

• The sender’s email or phone doesn’t match the name of the company that it claims to be from.
• The email or phone they used to contact you is different from the one that you gave that company.
• A link in a message looks right, but the URL doesn’t match the company’s website.2
• The message looks significantly different from other messages that you’ve received from the company.
• The message requests personal information, like a credit card number or account password.
• The message is unsolicited and contains an attachment.

How to report suspicious emails, messages, and calls

• If you receive a suspicious email that looks like it's supposed to be from Apple, please forward it to reportphishing@apple.com.1  
• To report a suspicious SMS text message that looks like it's supposed to be from Apple, take a screenshot of the message and email the screenshot to reportphishing@apple.com.
• To report spam or other suspicious emails that you receive in your iCloud.com, me.com, or mac.com Inbox, send them to abuse@icloud.com.
• To report spam or other suspicious messages that you receive through Messages, tap Report Junk under the message. You can also block unwanted messages and calls.
• Report scam phone calls to the Federal Trade Commission (U.S. only) at reportfraud.ftc.gov or to your local law enforcement agency."

Let us know if you have further questions.

Take care.