送信 そうしん がわSPM えすぴいえむじゃなかったです
sō shingawa esu pii emuja nakattadesu

Noun
Desu Copula

The polite, past negative form of 送信側SPM

1. Was not the sender SPM.; Wasn't the transmitting side SPM.

Past/Perfective
Negative
Polite
Casual Register
Computing