Send, only when the user allowed it in the environment, every recipient is
allowed, and today's cap has room for all of them. The cap counts
recipients, not messages. Held under a lock with the recipients recorded
before sending, so parallel sends cannot all pass the cap.
Send, only when the user allowed it in the environment, every recipient is allowed, and today's cap has room for all of them. The cap counts recipients, not messages. Held under a lock with the recipients recorded before sending, so parallel sends cannot all pass the cap.