There is one foolproof way you can confirm that the email is genuine.
Step 1) Open the email you received
Step 2) View the headers of the email using the "view headers" or "view source" option in your email client.
A good source of instructions for modern email clients is here - EXTERNAL LINK
Step 3) Search the message headers/source for a line that contains the letters SPF
If you see a line that says something like SPF "pass", this means that the server that sent the email is trusted by the owner of the email address. See example below from my Vampire order invite...
Received-SPF: pass (google.com: domain of email@example.com designates 188.8.131.52 as permitted sender)
In this above example, you can see that Gmail checked the email sender address against the server that sent the email, and confirmed that the email is trusted/legitimate.
You can use this same check on most emails you receive. I would guess that approximately 95% of legitimate email will show an SPF "pass" and nearly 100% of dodgy email will NOT show "pass"