Never open an attachment or e-mail attachment that you yourself do not wish to receive, unless there is prior confirmation, from the sender of the e-mail that the e-mail and attachments are indeed sent.

CURRENTLY, a lot of phishing links and trojan attachments are being sent via emails, and a lot of people just click on them. I was sent a link some time back via a mail, i knew it was phishing so i just closed it. Below is the mail screenshot. A lot of people have fallen prey to this but one way to always find a fake email is by confirming the sender address.