새 SMTP 제공업체로 전환 후에도 미보낸 이메일이 계속 발송되나요?

If the jobs failed due to Bravo not accepting them, the Sidekiq jobs responsible for sending them will be retried.

You can check the list of failed jobs up for retry in sidekiq (view the /sidekiq path as admin) and you should see these jobs in the retry queue.