In Athena Release 7.4, Moira was fixed to disallow the use of improper
mailing addresses.  You might encounter an error such as this, if an
attempt is made, for example, to forward mail to an address that is
not of the right format:

    athena% chpobox -s foobar
    chpobox: no at sign (@) in address "foobar"
    User jruser, Type POP, Box: jruser@PO6.MIT.EDU
      Modified by smsuser on 20-aug-1987 22:10:37 with convert

To correct this, enter the full path of the address to which you want to
send mail.  For example:

    athena% chpobox -s foobar@space.mit.edu

BE CAREFUL!  Moira does not actually check to see if the address actually
EXISTS, only if it in a correct format.  If there is no such mailing
address, you will not receive mail, and any mail sent to you will be
bounced back to the original sender.

When undoing the changes of forwarding your mail, be sure to use the "-p"
option to the chpobox command, rather than trying to set it again.
Otherwise, an error such as this might occur:

    athena% chpobox -s jruser@mit.edu
    Error: this will set a mail forwarding loop.
    Use "chpobox -p" to set a local post office server.

The correct command to get this behavior, then, would be:

    athena% chpobox -p
