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  Spam has become a serious problem. In order to win the war against spam, we use 18 weapons. The Blacklist, whitelist, and gray list should be the most basic tools in this battle against spam, this article will elaborate on how enterprises can

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

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Article Title: Principles of the mail system. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. What is an email

In the actual operation of the process, often need to use the password-free login, the following script to implement the server between the password-free, as followsFor example, to achieve a server with the B, C, D server-free login, only need to

Many friends may know that,Genie tribeOn the day that the trial version was launched, many people failed to register because of frequent errors in the email verification process (SINA and other email service providers could not allow me to use its

1. An email in the attachment format of RAR cannot be sent. The error is 451 QQ temporary problem (#4.3.1) Solution: this problem cannot be solved for the time being. It is a functional defect of clamav. ClamAV cannot decompress RAR files. I saw

Technical support analysts often complain about high server loads. In fact, cPanel software and its installed applications rarely cause high server load. The server owner, system administrator, or server supplier should conduct a preliminary

MHA (Master high availability) is a relatively mature solution currently available in MySQL, MHA when monitoring the failure of the master node, the slave node with the most recent data is promoted to become the new Master node, during which MHA

MHA (Master high availability) is a relatively mature solution currently available in MySQL, MHA when monitoring the failure of the master node, the slave node with the most recent data is promoted to become the new Master node, during which MHA