送信 そうしん がわSS えすえす利用 りよう しゃでしょう
sō shingawa esue suri yōshadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 送信側SS利用者

1. Probably the sending-side SS user.; Likely the sender's SS user.

Polite
Presumptive
Conjecture
Computing