Email shows wrong sender

Hello Kit65y,

Is this happening with each email you receive? Do you recognize the address before and/or after it changes? Does the content of the email pertain to you? If not, it’s possible it could be a phishing attempt to trick you into providing your personal information: Please refer to this article for more information on phishing attempts: Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Feel free to get back to us with any questions or problems you may have.

All the best.

Hey there Kit65y, 

It sounds like you may need to verify the email addresses saved for the affected contacts. Perhaps the same address is associated with more than one contact.

View your contacts in Contacts on Mac   

Have a good one!