Author: Zen and the Art of Computer Programming
1 Introduction
Configuring the server-side email service is crucial. Only with correct configuration can users ensure that they receive normal emails. For individual users, when browsing various information materials on the Internet and receiving various messages, if they do not set up an email address, they may not be able to receive the messages in time. Therefore, as an IT practitioner, you need to correctly configure your email server information and improve the efficiency of your daily work. So, the following will introduce how to correctly configure the server-side mail service.
2. Explanation of basic concepts and terms
SMTP (Simple Mail Transfer Protocol)
POP3 (Post Office Protocol version 3) Outbox Protocol version 3
IMAP (Internet Message Access Protocol) Internet Message Access Protocol
IMAP and POP3 are two different email access protocols. IMAP supports Read emails from multiple mailboxes, store emails, etc. at the same time, while POP3 only supports downloading emails, deleting emails, etc.
MX (Mail eXchange Servers) Mail exchange server
MX records the name of the mail server and is used to specify the IP address of the mail server.
SPF (Sender Policy Framework) Source Policy Framework
SPF was developed by the IETF (International Internet Engineering Task Force) to prevent domain names from receiving spam. Through SPF, you can help the mail server verify whether the sender's IP address is valid.
DKIM (DomainKeys Identified Mail) Domain Keys Identified Mail
DKIM is a signature scheme used to verify the identity of the sender.
DMARC (Domain-based Message Authentication, Reporting and Conformance) Domain name-based