Use regex to extract an email address from a sting in PowerShell

Get-EmailFromString.ps1

# Extract just the email address of user from string.

$regex = "[a-z0-9!#\$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#\$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?"
$userList = 'Mick Jagger <[email protected]>', 'Keith Richards [email protected]', 'Ronnie W [[email protected]]'
$emailList = [System.Collections.Generic.List[string]]::new()

foreach ($user in $userList) {
    $user -match $regex | Out-Null
    $emailList.Add($Matches.values)
}

$emailList