Most of us know that Gmail has a phishing alert feature, it alerts you when it thinks a mail is a phishing attack, but not much people have actually seen the alert.

Today, I received a mail claiming "Gmail account validation", and Gmail displayed a red alert on the top of the mail. Screenshots below.
By the way, it was a pretty strange phishing mail, because the fake URL in the mail isn't a clickable link, and going to the URL doesn't work. The whole mail is text, not the common image trick that most phishing mails use.