[Kazun]

Код:

$cOldEmail = Get-Content New.csv | ConvertFrom-Csv -Delimiter "," 
$cNewEmail = Get-Content old.csv | ConvertFrom-Csv -Delimiter "," 
$new = @()
$del = @()

$names = Compare-Object -ReferenceObject $cNewEmail -DifferenceObject $cOldEmail `
	-Property Name,Mail

foreach($name in $names)
{
	switch($name.SideIndicator)
	{
		"=>" {$new += $name;break}
		"<=" {$del += $name;break}
	}
}