AV>> ITN means "ifcico with Telnet-style connection control", unlike AV>> "raw ifcico" marked with IFC flag. AV>> All known IFC mailers ignore incoming Telnet control codes, and AV>> none of them actually send those codes. So, the ITN flag may be AV>> considered as an obsolete alias for IFC. KE> Some advanced users use FD with Vmodem, is that not ITN only.?
No - Vmodem uses plain TCP connections (see `tcpdump`), and FrontDoor knows nothing about Telnet.
-- Alexey V. Vissarionov aka Gremlin from Kremlin gremlin.ru!gremlin; +vii-cmiii-ccxxix-lxxix-xlii