noun
originator requested alternate recipient
A technical term from computing, likely related to messaging or communication protocols where the sender specifies an alternative receiver. Rare outside specialized documentation.
このプロトコルでは、発信者要求代行受信者フィールドに代替の受信者アドレスを指定できます。
In this protocol, you can specify an alternate recipient address in the originator requested alternate recipient field.
Compound of 発信者 (originator), 要求 (request), 代行 (acting on behalf), and 受信者 (recipient). The exact derivation is uncertain; it appears to be a calque or direct translation of an English technical phrase.