If you have a suspicious email that you think is a phishing scam or spam, you may want to  Forward as Attachment   to abuse@"company.com"  with the complete header available.  To see the complete header, follow these steps.

1.  Highlight the message you want to check the header on. 

2.  Go to View> Message> All Headers.

3.  Make sure you see the entire header which has all the routing information.

4.  In the top toolbar, go to Message > Forward as Attachment.  

5.  In the To:  box, enter the appropriate address.  In this case for Apple, it would be abuse@apple.com.  Depending on your email vendor, it could be abuse@gmail.com or abuse@hotmail.com.  If you recognize the company the email is spoofing as, you can Google their abuse email address.  

If the email is masquerading as a goverment entity, you can send it to phishing@irs.gov.

6.  Send.  If you get a reply to do something further, follow those instructions.