What you should know about SMTPs


In this digital age, email is the preferred communication method for any business. Therefore, neither individuals nor organizations want to compromise the deliverability of their emails.

You want your email to be sent without any interference, be it personal or corporate. The SMTP server is the perfect choice for secure and reliable email delivery capabilities.

Gmail and Outlook are one of the most popular communication platforms. These platforms are the best for one-to-one communication.

Businesses or any organization have different email needs. You may need to send a lot of automated emails. The SMTP server can perform this task efficiently.

Before diving deep into the SMTP example, let’s first look at what SMTP stands for and how it works. 

What is An SMTP ?

SMTP or Simple Mail Transfer Protocol is an application used to send, receive, and relay outgoing emails between sender and recipient.

When sending email, it uses SMTP to transfer from one server to another over the Internet. Simply put, SMTP emails are emails sent through the SMTP server. 

If the SMTP server is used to send emails, then we can define SMTP relay as a process of transferring an email from one server to another.

It is mainly used to deliver emails from one domain to another domain, which is different from the user’s domain.

The SMTP relay service can be used to resolve a lot of issues such as email deliverability, IP blacklisting, and so on. 

Understanding The Importance of SMTP Server

As mentioned earlier, SMTP servers are used to reliably and securely deliver transactional emails and bulk emails. There are many SMTP service providers on the market. The following are some of the advantages that such SMTP service providers offer: 

  • A secure environment for sending emails 
  • Dedicated IP addresses as well as flexible API and SMTP setup 
  • Today, most of the SMTP service providers don’t use port 25 as SMTP port, and hence the emails sent have a minimal chance of landing into the user’s spam folder 
  • Fast and customizable email integration. 
  • Real-time analytics to keep track of your emails.

There are several free and open source SMTP servers available. In addition, most paid SMTP services offer free trial plans.

Before choosing the service that suits your needs, you can choose to try different options. Generally, the free plan has a limit on the number of emails sent per day or month.

Therefore, if you are looking for an SMTP service for a large organization that can send hundreds or thousands of emails in batches, we recommend that you choose a paid SMTP service.

Workings Of A SMTP Server

The SMTP server role can be divided into two steps. The first step is to verify the configuration of the computer sending the email and grant permission for the process.

In the second step, you send the message and track the successful delivery of the email. If for any reason the email does not arrive, it will be returned to the sender.

The SMTP server understands simple text commands. The most common commands are as follows: 


HELO: Introduce yourself 

EHLO: Introduce yourself and request extended mode 

MAIL FROM: Specify the sender 

RCPT TO: Specify the recipient 

DATA: Specify the body of the email 

How To Know Your SMTP Server?

Have you ever wondered and asked yourself, “What is my SMTP server?” You can find it by performing a few steps on Command Prompt: 

  • Press the Windows key on your Windows machine keyboard 
  • Type “cmd” in the search box 
  • Open the Command Prompt application and type either of the following two commands: 
    • ping smtp.mysite.com 
    • ping mail.mysite.com 
  • Your SMTP server name will be displayed just after the word “Pinging” 

Understand SMTP With A Simple SMTP Server Example

Let’s now look at an example to simplify the SMTP protocol and understand the email flow better. 

Consider two persons – Tom and Jerry. Tom has a Gmail account – tom@gmail.com, while Jerry has an account of Yahoo – jerry@yahoo.com. Tom wants to send an email to Jerry. 

The following steps explain the process of email delivery from Tom’s account to Jerry’s account: 

  1. Tom drafts an email on his Windows PC. 
  2. He then provides Jerry’s email address and clicks Send. 
  3. Tom’s email client connects to his domain’s SMTP server that pushes the email. This server can be named as smtp.example.com. Here, Tom’s mail server will play the role of an SMTP client. 
  4. Tom’s mail server communicates with the yahoo.com mail server to deliver the message to Jerry. 
  5. Once the initial SMTP handshaking between the two servers is done, the SMTP client sends Tom’s message to Jerry’s mail server. Here, Jerry’s mail server will play the role of an SMTP server. 
  6. Jerry’s SMTP server scans the incoming message and recognizes the domain and the user name. 
  7. Jerry’s mail server receives the email, which is then stored in the mailbox. This email can be later fetched and read through an email application such as Outlook. 

So to conclude, the role of emails and the SMTP servers is pivotal in any organization for its smooth functioning.

It is always better to invest some time to do some basic research about the types of SMTP servers available in the market before choosing the one suitable for your business or personal needs.

After all, effective communication is the key to success!