It may be appropriate to use the tick,
notick, verb_on, or verb_off
keywords on certain BITNET channels. However, there is no information
about the use of these keywords in either DOMAIN NAMES or XMAILER NAMES
and bitnet_domains.com never generates any of these
keywords. Please refer to Batch Simple Mail Transfer Protocol,
by Alan Crosswell
(see the file PMDF_ROOT:[doc]bsmtp.) for additional
information on these keywords and the corresponding BSMTP commands they
generate.