Symantec PGP desktop email encryption

Hi,

can symantec pgp email encryption protect the users against the mail system administrators?

for example: a user a sending an email to another user and the mail system administrator has setup a rule to BCC all the mails to his mailbox, will the administrator be able to view and decrypt the mail?

I am not familiar with the product but i think the admin will be able to decrypt and read the mail normally.

thanks