Exim is a free MTA developed for Unix-like operating systems such as Linux, Mac OSX, Solaris and many more. Exim offers a great level of flexibility in routing mail on a network, with outstanding mechanisms and facilities for incoming mail monitoring.
MTA’s are installed on a mail server and email clients such as Mozilla Thunderbird, Evolution, Microsoft’s Outlook, and Apple Mail are installed on a mail client (user computer). In this article, we shall look at a round-up of the best and most used MTA’s on Linux mail servers .
What is an MTA and how does it work?
Your MTA delivers mail to other users on your system and MTAs communicate with each other to deliver mail all over a group of systems or all over the world. This series of tutorials helps you learn Linux system administration tasks.
The mail server uses a network application called Mail Transfer Agent (MTA). A MTA is an application that routes and transmits electronic mail from one node on a network to another.
A MTA is an application that routes and transmits electronic mail from one node on a network to another. It uses a protocol known as SMTP (Simple Mail Transfer Protocol) to perform its task.
Can a linux server provide ntp?
In RHEL / Cent. OS Linux we can use NTP or Open. NTPD server, which provides client and server software for time synchronization. The NTP package have utilities and daemons that will synchronize the machine time to Coordinated Universal Time (UTC) via the NTP protocol.
You might be wondering “What is the use of NTP in Linux?”
NTP (Network Time Protocol) NPT is used to synchronize a computer’s machine’s time with another time source. In RHEL / Cent. OS Linux we can use NTP or Open. NTPD server, which provides client and server software for time synchronization.
While we were researching we ran into the question “How do I know if a server is using NTP?”.
By using the ntpq program with the ‘-p’ option and specifying the network address of a server: The response indicates the time references that the server is currently utilizing and which is its currently preferred reference. NTP uses UDP port 123 to communicate with a peer.
NTP security is performed by ‘symmetric key cryptography’ or ‘authentication ’ as it is more commonly known. It allows a client to authenticate a server for trusted information exchange. Authentication is based on a number of agreed keys, or passwords, that are available to both client and server.
How do I enable NTP drift in Linux?
Install the NTP service. Modify the NTP configuration file, ‘/etc/ntp. Conf’, with required options. Add reference clock peers to the configuration file. Add drift file location to the configuration file. Add optional statistics directory to the configuration file. Enable and start the NTP service.