help force
force <player> <command>force state <player> <command>
This forces the player you specify to do the thing you specify. Use of this command is logged, and you cannot force someone of a higher level than yourself. Avoid using this command without the targets consent, although emergency use may be acceptable.
If you specify the 'state' option, the target player will run this command in their current command handling state... this could be the mailer, or the backwards state, or whatever. If the player isn't in a special state, this will work pretty much like 'force' normally does. Only players can be state-forced.