I'd like to filter out Fidonet posts whch are being gatewayed into Usenet. Seems that the Organization header contains "Fidonet" so I could filter on that but filtering on headers doesn't appear possible - or have I overlooked something?
You can only filter on the XOVER header-fields and the organization header-field is not part of XOVER.
Sooo... maybe a possibility to filter by "Header" "contains" "something"?
XOVER only contains the following header fields: