domain name mx record lookup

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What is MX (Mail exchanger?

MX is called a mail exchange record. Most netizens will have one or more free mailboxes, using Gmail, Hotmail, QQ, 163, etc.Our mailbox address format is: userName@gmail.com, userName@hotmail.com, userName@qq.com, userName@163.com When your

How to Use winmail to set up a virus-free email system

I. PrefaceIi. Basic Knowledge1. What is an IP address?2. What is a fixed IP address?3. What is a dynamic IP address?4. What is a domain name? What makes a domain name?5. What are subdomain names and second-level domain names?6. What is DNS?7. What

MX records, a records, and reverse resolution for EDM emails

Zheng Yi 20110330 Background: What is MXRecord? Used by the email system to locate the email server based on the recipient's address suffix when sending an email. For example, when the recipient is a user@mydomain.com, the system will parse

Common resource record types and application examples

The following is from the author of the "network administrator must read-Net Formation" (2nd edition) of the book.   7.6.2 main resource record types and application examplesAfter you create a zone, you need to add additional resource records to

DNS domain name resolution service for Linux systems

The role and type of 1.DNS systemThe role of DNS system in the network is to maintain an address database, which records the various host domain names also IP address correspondence, in order to provide the client program forward or reverse the

Domain name/IP anti-resolution

Today, with the proliferation of spam, spam has brought great harm to our life, work, and study. Due to the lack of an effective sending authentication mechanism between SMTP servers, even if spam recognition blocking technology is adopted, in

Golang in net package usage (i)

This is a creation in Article, where the information may have evolved or changed. NET package provides a portable interface for network I/O, including TCP/IP,UDP, domain name resolution, and UNIX sockets. Although the net package provides a lot of

Introduction to DNS Principles

DNS is one of the core Internet protocols. Whether it's surfing the web or programming, you need to know a little bit about it.This article describes in detail The principle of DNS and how to use the tool software to observe its operation. My goal

Linux DNS Server installation, configuration, and maintenance

Each IP address can have a host name that consists of one or more strings separated by a decimal point. With the hostname, do not memorize each IP device IP address, just remember the relative intuitive meaningful host name on the line. This is the

Questions about not being able to send emails to Yahoo,sina and other addresses

The problem is due to anti-spam software, which has been confirmed by Sina that they recently deployed a set of anti-spam systems. By default, the mail server sends its own FQDN name when it makes a helo command to establish a session with a Remote

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