We are most likely getting these messages because a person has
left the company without unsubscribing or has changed Email addresses.  This
can also happen when the mailbox is full or there is some other technical
malfunction which prevents the mailer agent from storing the message where
it belongs.  I got the feeling from the messages to and from Microchip that
they really want to fix it as soon as they find the trouble.

Martin McCormick