After receiving the immigrant package, the airline called before departure to inform that it could not board the plane.

Does the subject want to ask "the airline called before departure to tell the reason why it could not board the plane after receiving the immigration package"? There is something in the package that does not conform to the regulations. When handling immigrant packages, airlines will conduct security checks to ensure that there are no dangerous goods or contraband in the packages. If there are any irregularities in the package, the airline will inform the passengers that they cannot board the plane for further processing.