送信 そうしん がわSPM えすぴいえむではありませんでした
sō shingawa esu pii emudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 送信側SPM

1. Was not the transmitting SPM.; Was not a transmitting SPM.

Past/Perfective
Negative
Polite
Formal Register
Computing