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JMAP is an efficient, modern email and collaboration protocol that supports synchronization of emails, calendars, contacts, and other data, featuring batch operations, incremental sync, multi-device support, and is suitable for web and mobile application development.

LDAP is a lightweight directory access protocol used for unified management of users, permissions, and network resources, supporting fast queries and cross-platform applications, widely used in enterprise authentication and single sign-on.

MX记录是DNS中指定邮件服务器的资源记录，用于正确路由电子邮件至目标服务器。

A comprehensive guide to understanding MX resolution for business email

Understand the three most important concepts of email in one article

One article to understand the characteristics and dangers of phishing emails