発信 はっしん しゃ要求 ようきゅう代行 だいこう受信 じゅしん しゃでしょう
hasshinshayō kyūdaikōjushinshadeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 発信者要求代行受信者

1. Probably the sender requested a proxy receiver.; Likely the sender requested a proxy recipient.

Polite
Presumptive
Conjecture
Computing