As a mail message traverses BITNET, progress messages are sent back to
the message's originator and broadcast on their terminal. These
messages may be suppressed by applying the nolocaluser
keyword to the bit_ channels. This is best done with the
CHANNEL_KEYWORD_OPTIONS symbol in the
bitnet_domains_driver.com procedure as described in
Section 3.8 . See Section 2.2 for details on and implications of the
nolocaluser keyword.