The Role and Benefits of SMTP Explained


What is SMTP and what is its use – In today’s digital age, the ability to send emails has become an essential part of our personal and professional lives. Whether it’s for communication, marketing, or information dissemination, email has become one of the most commonly used methods of correspondence. But have you ever wondered how these emails are sent and received? This is where SMTP (Simple Mail Transfer Protocol) comes into play. In this article, we will explore the role and benefits of SMTP in the world of email communication.

What is SMTP?

SMTP, which stands for Simple Mail Transfer Protocol, is a standard communication protocol used to transmit email messages over the Internet. It is a set of rules and guidelines that allow email servers to send and receive messages from one another. Think of SMTP as the postal service for emails, ensuring that your messages are correctly addressed and delivered to the intended recipient’s mailbox.

When an email is sent, the SMTP server acts as a relay between the sender’s email client (such as Gmail or Outlook) and the recipient’s email server. It handles the transportation of email messages across different networks and servers until it reaches its destination.

The Importance of SMTP

SMTP plays a crucial role in ensuring the reliable and efficient delivery of email messages. Here are some key reasons why SMTP is essential:

  1. Email Routing: SMTP determines the most suitable route for an email to reach its recipient’s email server. It analyzes network conditions and uses various techniques to find the fastest and most reliable path for the message.
  2. Email Authentication: SMTP ensures that the sender’s email address is verified, preventing unauthorized users from sending emails on behalf of someone else. This reduces the risk of spam and phishing attacks.
  3. Error Handling: SMTP includes mechanisms to handle errors that may occur during the delivery process. It detects and notifies the sender of any issues, such as a non-existent email address or a full mailbox.
  4. Security: SMTP supports encryption protocols, such as Transport Layer Security (TLS), to provide a secure channel for email transmission. This helps protect sensitive information from interception or unauthorized access.

Benefits of SMTP

SMTP offers several benefits that contribute to the smooth functioning of email communication. Let’s take a closer look at some of these advantages:

  1. Reliability: SMTP ensures that email messages reach their intended destination by utilizing reliable delivery mechanisms. It automatically retries failed deliveries and provides notifications of any delivery issues.
  2. Efficiency: SMTP optimizes email transmission by using efficient routing methods. It minimizes network congestion and reduces the chances of message delays or losses.
  3. Compatibility: SMTP is a widely supported protocol used by most email servers and clients. This ensures seamless interoperability between different email systems, allowing users to communicate across various platforms.
  4. Scalability: SMTP is designed to handle a large volume of email traffic. It can efficiently manage high loads and distribute messages across multiple servers, ensuring smooth operation even during peak times.
  5. Flexible Configuration: SMTP allows users to customize settings according to their specific requirements. It provides options for configuring delivery preferences, handling bouncebacks, and defining security protocols.
  6. Integration: SMTP can easily integrate with other email-related services, such as antivirus scanners, content filters, and mailing list management tools. This allows for additional layers of security and functionality in email communication.

What is SMTP and what is its use ⇓

How to do SMTP on a WordPress Site Step-by-step

  1. Install Plugin Wp Mail SMTP
  2. Search on your browser Google Developer Console –
  3. Create New Project and Put your Project Name What is SMTP and what is its use


 4. Select your Project like my Project Name is Testing Google Developer Console


5. Click On Navigation Menu – API and Services – OAuth consent screenGoogle Developer Console


6. Select external and Click On CreateGoogle Developer Console SMTP


7. It will ask you app name and mail id, then you can enter project name in app nameGoogle Developer Console SMTP

8. Scroll Down there will see this option ⇒ Developer contact information add your mail id ⇒ Save And Continue Developer contact information SMTP

9. Next step is ⇒ Scopes ⇒ Test Users ⇒ Summary 

  • Scopes – Save and Continue
  • Test Users – Save And Continue
  • Summary – Back To Dashboard

Wp Mail SMTP

10. Publishing status – Click On PUBLISHE APP

Google Developer Console SMTP

10. Click On ⇒ Credentials ⇒ Create Credentials ⇒ OAuth Client ID

Google Developer Console

11. Create OAuth client ID ⇒ Web Application 

12. Web Application ⇒ Add Your Project Name ⇒ Scroll down – Authorised redirect URIs

( Authorised redirect URIs is – )

You will get (Authorized redirect URIs) from SMTP plugin

13. In Authorised redirect URIs Paste the URL and Create

What Is SMTP

14. You can see the Client ID and Client Secret here, copy it.

Client id and Client secret

15. Go to Library option ⇒ Search Gmail API ⇒ Select Gmail API ⇒ Click On Enable 


16. Go to your Mail SMTP plugin Setting ⇒ General ⇒ Primary Connection ⇒ Add your Form Mail ⇒ Add Your FromName ⇒ Mailer ⇒ Select Google 

16. Then Scroll down You will see Google / Gmail Client Id, Client Secret and Authorized redirect URIs below this.

SMTP Client ID and Client Secret

17. Here you can paste the Client ID and Client Secret that we copied.

18. Scroll down Allow OAuth Connection ⇒ Save Setting 

19. Scroll Up – Scroll up and you will see this option under General. ( The Email Test tab was moved to WP Mail SMTP > Tools)

What is SMTP and what is its use

20. Click on ⇒ WP Mail SMTP > Tools ⇒ Send Test Mail ⇒ Open Your Gmail And Check



SMTP plays a critical role in the world of email communication by facilitating the secure and efficient delivery of messages. Its ability to handle routing, authentication, error handling, and security ensures that emails are reliably transmitted across networks and reach their intended recipients. The benefits of SMTP, including reliability, efficiency, compatibility, scalability, flexibility, and integration, make it an indispensable protocol for modern email systems. So the next time you hit “send” on an email, remember that SMTP is working behind the scenes to ensure that your message reaches its destination successfully.

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