E-mail isn’t secure. It passes through many strange networks. It can be examined. It can be spoofed. It can be tampered with. It can be kept when you want it to be discarded. It can carry so many nasty surprises. When using it, you need to be on your guard.
So let us help you out, Moses style:
Thou shalt not click the links in messages.
If an e-mail has a hyperlink to your bank — or some other website you would provide confidential information to — do not click or follow the link! It is very easy to “spoof” a link (i.e. making a link display as https://www.mybank.com, yet having it forward to http://www.badguy.net). It is better to copy the link to the clipboard and paste it into your browser. That way, you can inspect the real link URL before you submit it.