The mailproc-stop accessor stops the identified mailprocessor in a MailTransport.
A mailprocessor which has been stopped will cease to poll a mailbox for new messages but remains in the
MailTransport and may be restarted with mailproc-start.
The MailTransport which receives the notification to stop the named mailprocessor is located dynamically and is discovered from the
first instance of ffcpl:/etc/MailTransportConfig.xml in the current module address space.
For more information on the operation of the MailTransport see the MailTransport guide.