Received an e-mail from Yahoo in spam folder stating I need to do an upgrade. Is this legitimate?

100% scam.

That is a scammer trying to hi-jack your email address to spam all your contacts and then use the account to spam hundreds/thousands of others.

Yahoo and all email companies, all banks and all companies in the entire world will NEVER ask for your password, pin or date of birth. No Exceptions Ever.

Ignore and delete that email and any others demanding such information.

If you have responded to a scammer, you are on his 'potential sucker' list, he will try again to separate you from your cash. He will send you more emails from his other free email addresses using another of his fake names with all kinds of stories of needing your password, great jobs, lottery winnings, millions in the bank and desperate, lonely, sexy singles. He will sell your email address to all his scamming buddies who will also send you dozens of fake emails all with the exact same goal, you sending them your cash via Western Union or moneygram.

Do you know how to check the header of a received email? If not, you could google for information. Being able to read the header to determine the geographic location an email originated from will help you weed out the most obvious scams and scammers. Then delete and block that scammer. Don't bother to tell him that you know he is a scammer, it isn't worth your effort. He has one job in life, convincing victims to send him their hard-earned cash.

Whenever suspicious or just plain curious, google everything, website addresses, names used, companies mentioned, phone numbers given, all email addresses, even sentences from the emails as you might be unpleasantly surprised at what you find already posted online. You can also post/ask here and every scam-warner-anti-fraud-busting site you can find before taking a chance and losing money, email address or identity to a scammer.

If you google "yahoo email phishing scam", "email hijacked viagara porn spammer" or something similar you will find hundreds of posts of victims and near victims of this type of scam.

In fact, if you check out the section here at Yahoo Answers entitled "Yahoo email, spam and bulk mail" you will find hundreds of questions from victims who have had their email address hi-jacked or spoofed by scammers sending out porn and viagra spam.

iSCAM

That's NOT from Yahoo, it's a phishing scam to hack your account

1 - ALL emails regarding your account will be from an @yahoo-inc.com address, NEVER @yahoo.com

2 - ALL emails regarding your account will ALWAYS have a purple Y! logo to the left of the message in your Inbox

3 - ALL emails regarding your account will always address you by your name, never a generic greeting (Dear Customer, Dear Yahoo Account Holder, Dear Valid User, etc), your email address or no greeting at all

4 - Yahoo will NEVER ask for any personal details in an email and will never ask you to click on a link. The ONLY time you are asked for personal info is when you first set up your account

Mark as Spam so it gets reported to Yahoo and they can shut down that account

Scam!!!! That's a phishing email from hackers. Don't reply to the message and give out your personal information to them or your account will be at risked of being hacked once this happens. Remember that Yahoo doesn't send unsolicited emails to all its users and ask for your information, as the company already has all that stored in its well-secured servers. Just get it deleted without delay.

When you receive emails from Yahoo, look for the purple insignia seal to the left of the sender's name. It will indicate to you the official messages come straight from the company and not from the scammers, ending only with @cc.yahoo-inc.com.

sounds like a phishing attempt. I wouldn't fill in my contact details there. Why would yahoo use another domain?

in my opinion: spam

Do not go to that website!