noun
secondary email address
Common abbreviation of サブアドレス, used in computing contexts for an additional email address.
See also: サブアドレス
登録にはメインのメールアドレスとサブアドが必要です。
Registration requires a primary email address and a secondary email address.
noun
sub-address
General term for a sub-address, such as a secondary location or identifier; less common than the email-specific sense.
このシステムでは、各デバイスにサブアドが割り当てられます。
In this system, each device is assigned a sub-address.