フリー問題

問題文

A sending domain has been placed on a blocklist (denylist). What is the likely consequence?

選択肢

1. The emails are guaranteed to reach the primary inbox, and that would hold in essentially all situations a marketer might encounter
2. It only affects the subject line, not delivery
3. Open rates automatically increase
4. Mailbox providers may reject or filter the mail, reducing deliverability