<Tr> <Td> Kopano </Td> <Td> Yes </Td> <Td> External </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> External </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td>? </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> No </Td> <Td> AGPLv3, paid </Td> </Tr> <Tr> <Td> MagicMail </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td>? </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> No </Td> <Td> (1) and proprietary editions </Td> </Tr> <Tr> <Td> Mailsite </Td> <Td> No </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td>? </Td> <Td> Yes </Td> <Td> Yes </Td> <Td>? </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Proprietary </Td> </Tr> <Tr> <Td> Mailtraq </Td> <Td> No </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td>? </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> No </Td> <Td>? </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Yes </Td> <Td> Proprietary </Td> </Tr>

Which is the best mail server for windows