What does cursus ēlectronicus mean in Latin?

cursus ēlectronicus, a noun, means “email (system)”.

What is the genitive of cursus ēlectronicus?

The genitive singular is cursūs ēlectronicī. cursus ēlectronicus is fourth declension.

In classical Latin, [ˈkʊr.sʊs ɛ.ɫɛkˈtrɔ.nɪ.kʊs]; in ecclesiastical (church) Latin, [ˈkur.sus e.lekˈtrɔː.ni.kus].

nounfourth declension

cursus ēlectronicus m (genitive cursūs ēlectronicī)

Classical[ˈkʊr.sʊs ɛ.ɫɛkˈtrɔ.nɪ.kʊs]Ecclesiastical[ˈkur.sus e.lekˈtrɔː.ni.kus]

New Latinemail (system)
Nam secundum expertos hoc inventum congregat maxime homines inter se, quum cursus electronicus et aulae colloquiorum sive locutoria res admodum frigidae pro Skype esse videtur.For according to the experts, this invention brings people together a great deal, since email and the halls of conversation, or chatrooms, seem to be very insipid affairs compared to Skype.2005, Skype: rerum telephonicarum nuntiata eversio., Ephemeris:
2011, Reijo Pitkäranta, Cursus electronicus XL annorum https://archive.org/stream/NewsInLatinByReijoPitkaerantaAndTuomoPekkanen2005To2012/LatinitasModernaNuntiiLatiniLatinNews_djvu.txt, Nuntii Latini (21.10.2011)On this day, email turns forty years old.