pop3 question

hi

1 - i want to create a hash on an attachment of a pop3 mail, without
downloading the file itself.
is that possible?
is there any way to download a part of the attachment using the pop3
protocol? (like: "i want to receieve bytes 100 to 200 of attachment no
3 in message no 2).

2 - is it possible to forward a message from a pop3 account, including
the message's attachments - without downloading the attachments?

thanks.