{"id":11134,"date":"2024-01-02T15:21:00","date_gmt":"2024-01-02T09:51:00","guid":{"rendered":"https:\/\/www.wpoven.com\/blog\/?p=11134"},"modified":"2024-02-01T15:53:13","modified_gmt":"2024-02-01T10:23:13","slug":"smtp-server-setup-usage-and-best-practices","status":"publish","type":"post","link":"https:\/\/www.wpoven.com\/blog\/smtp-server-setup-usage-and-best-practices\/","title":{"rendered":"SMTP Server Setup, Usage, and Best Practices"},"content":{"rendered":"\n
Are you looking for SMTP Server Setup? Then you have landed on the right post, but before we directly start with the main topic first let me ask you a simple question, ever wondered how Emails work? When you send an email and within a few seconds they are in your recipient’s Inbox, the technology behind how this happens is Simple Mail Transfer Protocol (SMTP). <\/p>\n\n\n\n
How emails are stored on the server once received using the IMAP\/POP3 Server is a story for a different time, for now, we will cover SMTP and by the end of the article, we hope you have a complete understanding of the SMTP Server setup, STMP Protocol, SMTP Servers, SMTP server best practices, usage, Common options and how to ensure your emails have done land up in SPAM.<\/p>\n\n\n
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Then what are you waiting for? Let us get started!<\/p>\n\n\n\n
What is SMTP?<\/h2>\n\n\n\n
Simple Mail Transfer Protocol (SMTP) is the protocol used to Send Emails, it defines a common standard so that any SMTP server can communicate with any other SMTP Server or POP3\/IMAP server on the internet and they understand each other. You can say it ensures that different entities involved in the transfer of emails speak a common language.<\/p>\n\n\n
One of the Cheapest , Free if sent from AWS EC2 server<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n
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How to Setup Local SMTP Server?<\/h2>\n\n\n\n
If you are looking to set up an SMTP server on your PC or computer, you need to figure out on which operating system your PC is working. Typically, we have three major operating systems in use, Windows, macOS, and Linux. <\/p>\n\n\n\n
Therefore, we shall provide you with a complete SMTP setup guide for the following popular PC operating systems. <\/p>\n\n\n
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1. macOS SMTP Setup<\/h3>\n\n\n\n
Nowadays, you will find the latest versions of macOS come preinstalled with a default email server, Postfix. It is one of the most popular mail servers. You will also find it the best email server for Linux, which we will also consider in the later section of this post.<\/p>\n\n\n\n
Since the mail server by default comes with the OS, the only thing left for you to do is to make minor changes to it, and you are done. This is how it’s done:<\/p>\n\n\n\n
1.1. Configuring Postfix<\/h4>\n\n\n\n
Step 1:<\/strong> The first thing you need to configure Postfix’s main configuration file. Run the following command:<\/p>\n\n\n\n
sudo vim \/etc\/postfix\/main.cf<\/strong><\/code><\/p>\n\n\n\n
Step 2:<\/strong> Now command the postfix to use the name, so that it can easily identify by other email servers. To do this simply add the command lines as given below:<\/p>\n\n\n\n
Now if your local hostname is “name” the email received by other email servers will be identified as “name@domain.com<\/strong>“.<\/p>\n\n\n\n
Step 3:<\/strong> Now you have to configure the relay host, which is responsible for allowing emails to receive after proper authentication and relay them to the SMTP server.<\/p>\n\n\n\n
Now you have successfully been able to set up your local SMTP server. You can even check if it is working or not by simply sending out a test email:<\/p>\n\n\n\n
date | mail -s \"Test email\" recipient@test.com<\/strong><\/code><\/p>\n\n\n
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2. Linux SMTP Server Setup<\/h3>\n\n\n\n
Quick MTA Comparison, we will choose Postfix as we will be working with Linux –<\/p>\n\n\n\n
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\n\t
if you are... <\/th>
qmail <\/th>
Exim <\/th>
Sendmail <\/th>
Postfix <\/th>
Notes \n<\/th>\n<\/tr>\n<\/thead>\n
\n
\n\t
Inexperienced \n<\/td>
0 <\/td>
3 <\/td>
1 <\/td>
3 <\/td>
Exim and Postfix have good docs and clear examples \n<\/td>\n<\/tr>\n
\n\t
Worried about security \n<\/td>
3 <\/td>
2 <\/td>
0 <\/td>
3 <\/td>
Postfix is secure and modern; qmail is secure but very old and cranky; Exim is secure to different criteria (read above.) \n<\/td>\n<\/tr>\n
\n\t
Relying on Sendmail milters \n<\/td>
0 <\/td>
1 <\/td>
3<\/td>
2<\/td>
Postfix can run milters; can use equivalent Exim routers\/filter script \n<\/td>\n<\/tr>\n
\n\t
Wanting minimum hassle \n<\/td>
0 <\/td>
3 <\/td>
0 <\/td>
3 <\/td>
Sendmail has some easy front-ends, but the deeper you go the worse it gets. Postfix and Exim are more predictable. \n<\/td>\n<\/tr>\n
\n\t
Resource-constrained \n<\/td>
3 <\/td>
2 <\/td>
1 <\/td>
2 <\/td>
See Embedded Application<\/i> below for other comments \n<\/td>\n<\/tr>\n
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On Windows \n<\/td>
0 <\/td>
2 <\/td>
3 <\/td>
0 <\/td>
Sendmail has a native Windows port; Exim is in the Cygwin distro \n<\/td>\n<\/tr>\n
\n\t
Needing commercial support \n<\/td>
1 <\/td>
3 <\/td>
3 <\/td>
3 <\/td>
There are competent companies for all MTAs; qmail is inherently less supportable being so old \n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
Postfix<\/strong> is a Mail Transfer Agent (MTA) that can act as an SMTP server or client to send or receive email. It is one of the best Linux mail servers which is easy to set up and configure and we ourselves use it for most of our needs, it can also be set up to act as an intermediary to forward emails through third-party email services. We will only cover the basic setup and send your first email.<\/p>\n\n\n\n
However, most of the Linux distros generally come up with the two best email servers for Linux: Sendmail and Postfix. But you might find it difficult to use Sendmail and configure it because it has a complex design and is even less secure. That is why postfix is predominantly used and even we are also using it in this guide.<\/p>\n\n\n\n
The simplest setup consists of installing postfix and you should be good to go.<\/p>\n\n\n\n
Such a bare-bones setup will work technically but your Emails might land in SPAM, to cater to this and ensure better email deliverability, we have another guide where we add the other requirements like DKIM or SPF which are needed to make sure your Emails go through. But still, unless there is a very good reason, we do not recommend running your own Email Server.<\/p>\n\n\n\n
This process assumes that you have a newly installed Ubuntu 20.04 and that you can work with command-line Linux, if not we recommend using one of the existing SMTP Providers. We will set up postfix on the Ubuntu 20.04 server and send an Email using it to our very own dummy service for testing to see if it works.<\/p>\n\n\n\n
To begin we will issue the update cache command for the apt package manager<\/p>\n\n\n\n
sudo apt update<\/strong><\/code><\/p>\n\n\n\n
Next, we will install postfix using the following command –<\/p>\n\n\n\n
The installation will open up a bunch of prompts please make the following selections –<\/p>\n\n\n\n
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General type of mail configuration? : For this, we will choose an Internet Site<\/strong> since this matches our infrastructure needs.<\/li>\n\n\n\n
System mail name: This is the base domain that will be used to send an email if no sender domain is specified by the user. So, if you send an email from say user1 and no domain is specified this will be postfixed to the email. So, if example.com is given, it will send an email from user1@example.com.<\/li>\n<\/ul>\n\n\n\n
Now you have to configure your mail server i.e. postfix so that it can process requests to send mail from the local host. To make this happen, you have to make certain changes in the main.cf file by using the following commands:<\/p>\n\n\n\n
In addition to that, you also have to make changes to the “mydestination”, which shows the list of all the domains, which will look something like this:<\/p>\n\n\n\n
We are all set and our SMTP server should be up and running. Next, we can send an Email to some users on the internet or maybe catch all emails to test things.<\/p>\n\n\n\n
You can even try to send a test mail by using the following command:<\/p>\n\n\n\n
echo \"Email testing 123\" | mail -s \"Subject line for test email\" receipient\u2019s_email_address<\/strong><\/code><\/p>\n\n\n
Although you will find multiple software available that can help you to set up a Windows SMTP server, here we are using hMailserver for your reference. <\/p>\n\n\n\n
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