1. 简介

IMAP [RFC9051] 定义了消息关键词, [RFC5788] 创建了 "IMAP and JMAP Keywords" 注册表. [RFC8457] 创建了 "IMAP Mailbox Name Attributes" 注册表, [RFC8621] 更新这些注册表, 使其也适用于 JMAP 消息和邮箱.

本文档定义并注册 17 个消息关键词: $autosent, $canunsubscribe, $followed, $hasattachment, $hasmemo, $hasnoattachment, $imported, $istrusted, $MailFlagBit0, $MailFlagBit1, $MailFlagBit2, $maskedemail, $memo, $muted, $new, $notify, and $unsubscribed. 它还定义并注册三个邮箱名称属性: Memos, Scheduled, and Snoozed.