how email forwarding works

How to Do SSH tunneling (port forwarding) In this post we will see how SSH works ?, What is SSH tunneling? What is important of SSH tunnels and how to setup the SSH tunnel.When SSH server is installed in machine then by default its allowed SSH

  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

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

Vro configuration is mainly used to debug the vro, making it more convenient and convenient for future use. According to RFC 2267, Internet service providers (ISPs) must use a filter similar to this type on the network. Note that the ACL at the end

Email Service The email service is based on the customer/server model. For a complete email system, it consists of three components. 1. The user agent interface between the user and the email system is responsible for sending emails to the mail

Qmail is the sendmail server software installed in the world, which is second only to Linux/Unix by default. Qmail configuration is simpler than Sendmail, and the speed is faster. Therefore, during the setup of this mail system, I chose Qmail as the

Network Interconnection device lecture Network Interconnection device Overview When connecting a computer to a computer or workstation to a server, in addition to using the connection media, you also need some intermediary devices. What are the main

Linux under Iptables configuration detailed-A rh-firewall-1-input-p tcp-m State--state new-m TCP--dport 24000-j ACCEPT-A rh-firewall-1-input-s 121.10.120.24-p tcp-m tcp--dport 18612-j ACCEPTIf your iptables basic knowledge is not yet known, it is

Linux Mail Server Postfix, qmaill, and Sendmail competition-Linux Enterprise Application-Linux server application information. For details, see the following. A few years ago, only Sendmail was available for free mail servers in Linux. However, due

Hub, switch, router, working principle 1. A switch is also called a switch hub. It regenerates information and forwards it to a specified port after internal processing. It has the ability to automatically address and exchange information, the