Got one of my customer who ask me this question, how do we know if this mail is a fake mail or spam mail etc. Simple first look at the sender to see if is someone you know. Then examine his email to see if is tally with the secender.
Example if the sender is from john smith and the email address is 06alpha21@xxxx.com then this look suspecting. you can then send a real message to John Smith and check with him that did he send you this mail with the following content etc.
Another case will be if is coming from a courier services check also the email address as it could be something else. or make a phone call to the courier service to enquire regarding this parcel etc.
There is one case that your friend mail could be hack and sending from him to you. but those mail could easily find with fault if you look at the detail.
I had a mail from “paypal” saying that i had make purchase to a site of 149.99 dollars and the mail look real, after a few detail examine on the mail i realize that the problem is that email account that “paypel” send me was wrong and i never use that mail to register with paypel.
So a if you are careful before you click the mail it could save you from getting a tech to come and help.
Regards
Hickural