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Page title (without namespace) (page_title) | 'A Step By Step Guide On How To Set Up An Smtp Server On Linux' |
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New page wikitext, after the edit (new_wikitext) | 'Electronic mail or e-mail is an important part of your professional business communication. A free web-based email service is enough for personal use. However, if your company is huge like an online store it will require an individual mail server.<br><br>Configuring an SMTP server on a Linux server can bring many advantages. These are just a few of the many benefits that an Linux mail server offers:<br><br>Secure, reliable and scalable.<br>It doesn't require expensive hardware.<br>Supports POP3, IMAP, and access to webmail.<br>You can set up a powerful anti-spam filter as well as an effective antivirus to make your computer more secure.<br><br>There are many ways to configure the server and run it according to your requirements. But I find Postfix to be among the coolest open source mail transfer agents (MTA) to configure and also the most reliable. It can be set up in single-user environment and multiple users' environment with equal ease. It's very versatile and is a great fit in every environment.<br><br>A step-by-step guide for setting up the CentOS 7 mail server<br>Before starting, be sure you have updated your system and install epel Release in your server.<br><br># yum update - y.<br><br>yum install epel-release the y<br><br>Installation<br>Postfix mail server can be installed easily using these steps:<br><br>1.) Install Postfix packages by typing the command:<br><br>yum install postfix - you<br><br>It's done! Once the installation is completed after which the Postfix daemon will begin automatically for you. You can test it once the installation is completed.<br><br># telnet localhost 25<br><br>It could be something like:<br><br>Trying ::1...<br>Connected to the localhost.<br>Escape character is '^]'.<br>220-mail.znettest.tk ESMTP Exim 4.89_1 #1 Tue, 20 Feb 2018 13:29:17 +0530<br>220-Unsolicited transportation is not allowed.<br>220 and/or bulk emails<br><br>Note Take note that [https://www.misterpoll.com/users/stenderseerup391 Click Here], mail.znettest.tk is the hostname used by this server.<br><br>Linux Configuring SMTP Server<br>Configuring Postfix<br><br>One configuration file is required for Postfix mail servers: /etc/postfix/main.cf. This contains all the information about the mail service.<br><br>Open the file in the vi or any other text editor and then look for the next section:<br><br>vi /etc/postfix/main.cf<br><br>Myhostname=<br>inet_interfaces= all<br>inet_protocols = ipv4<br>alias_maps = hash: /etc/aliases<br>mydestination =<br>mynetworks =<br><br>These are the areas of the configuration file you must focus on. And, I must say that there's nothing much to be done. Underneath are the sections you'll need to set up:<br><br>myhostname: This parameter indicates the internet hostname for this mail daemon. The default setting is to use a fully qualified domain name.<br><br>Mydestination: This parameter determines which destinations this machine will provide locally. Use the configuration locally which has been provided by default in the server and change your localhost name to the domain name.<br><br>mynetworks: This line is more risky. This entry will determine authorized destinations that mail can be sent to. If you are thinking to add your subnet here, there are partial chances of its success.<br><br>Mynetworks has an entry that looks like this:<br><br>mynetworks = 127.0.0.1/8<br><br>This entry is secure and only defines local machines.<br><br>Inet_interfaces defines the network interface addresses where it will receive mail. By default, the program will ensure that all active interfaces are active on the system. This parameter regulates the delivery of mail to user@[ip.address[ip.address].<br><br>inet_protocols=ipv4<br><br>It is default set to IPv4 for faster mail delivery<br><br>Save and close the vi editor. Start/enable the mail server by using the command, so that it will be Active after server reboot.<br><br>systemctl restart postfix<br><br># systemctl enable postfix<br><br>The installation of the mail service is complete. It's time to create an account to test the service.<br><br>Create users<br><br>This is an Linux mail server so you must ensure that your user name is in line with your email addresses. This command can be used to create user accounts:<br><br>useradd useradd USERNAME (USERNAME is the actual name of the user).<br><br>The following step is to give the username, password using the command:<br><br>passwd USERNAME<br><br>Test Your Server<br><br>Mail utils is a package that can be used to install the essential items needed to send mail.<br><br>Yum install mail x y<br><br>Then you can try any email ID by typing:<br><br>Mail (mailid).<br><br>It will ask for the question. Enter the content you want to share.<br><br>After you have completed the process, exit and end the mail by making use of a dot (.)<br><br>Your mail server is ready to handle mails according to your needs.<br><br>Additionally, you can utilize SMTP relay to allow the use of a multi-function device, printer, or an application for sending e-mails by making use of Office 365 as well as Exchange Online. ZNetLive lets you choose among a wide range of Microsoft Office 365 plans that meet your requirements. This allows you to operate your business with ease anywhere in the world.' |
