Hello, on the Mystic wiki i can read:
"Create semaphore
This setting determines wheter or not Mystic will create semaphore files immediately when saving a message, or if it will wait for the user to logoff.
This can be a powerful tool to enable messages to be sent within 60 seconds of a user saving a message on your BBS.
When combined with a MUTIL option for [ExportEchomail] "skip_online".
If this value is set to false, Mystic will toss new messages posted by them even if they are currently logged into the BBS."

Wher i can set waiting time like 60 seconds or 120?

--- Mystic BBS v1.12 A48 (Linux/64)