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A US woman discovered she had won $3m (£2.2m) from the lottery after checking her spam folder for an unrelated email.

Laura Spears, 55, had purchased a Mega Millions ticket online from the state lottery after she saw the jackpot climbing into the hundreds of millions.

"A few days later, I was looking for a missing email from someone, so I checked the spam folder in my email account," she told lottery officials.

"That's when I saw an email from the lottery saying I had won a prize."

"I couldn't believe what I was reading, so I logged in to my lottery account to confirm the message in the email," she said, calling the win "shocking".

She now plans to retire early, and to monitor her emails more closely in the future.

"I definitely added the Michigan Lottery to my safe senders list just in case I ever get lucky enough to receive another email about a huge prize," she said.

Mega Millions lottery tickets are sold for two dollars in 45 states.

In 2018, a single winner in South Carolina walked away with a record $1.6bn Mega Millions win.