Precedence is an older header used to mark bulk or list messages. Learn how it’s used and its modern relevance.
Precedence is a legacy header sometimes set to values like bulk, list, or junk. Some autoresponders and systems use it to decide whether to respond.
While it’s not a modern standard for deliverability, it still appears in some ecosystems. It’s most relevant for avoiding auto-reply loops and handling list mail responsibly.