mx domain lookup

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

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

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

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

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

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

Netstat Command Overview:Netstat is a very useful tool for monitoring TCP/IP networks, which can display routing tables, actual TCP network connections, TCP and UDP snooping, process memory management, and status information for each network

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

Reprinted from (http://blog.csdn.net/u010430304/article/details/54601302)Basic application of JndiJndi is a shorthand for Java naming and directory Interface (Java naming and directory interface), which is the API for providing naming and directory

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