Test Your SMTP Configurations

Ensure Your SMTP System is Working Perfectly | Use Our Secure Tool Description: Don't risk sending emails from a faulty SMTP system. Our secure tool ensures that your system is working perfectly! Our tool doesn't collect or store any personal information, so you can use it with confidence.

Input SMTP info to test

What is SMTP?

SMTP (Simple Mail Transfer Protocol) is a protocol used for sending email messages between servers. It is the standard protocol used for email delivery on the Internet. In this tutorial, we will cover the basics of SMTP and how it works.

SMTP is a text-based protocol that uses port 25 by default. The SMTP protocol is responsible for sending email messages from one server to another. It works by establishing a connection between two servers, where the sending server submits the email message to the receiving server.

SMTP uses a client-server architecture where the client (usually an email program or a webmail interface) sends the email message to the SMTP server. The SMTP server then relays the message to the recipient's SMTP server, where it is then delivered to the recipient's mailbox.

SMTP is a reliable protocol and uses several mechanisms to ensure that email messages are delivered successfully. For example, SMTP servers use a series of response codes to indicate the status of the message delivery process. These response codes are in the form of three-digit numbers that indicate whether a message has been accepted, rejected, or needs further processing.

SMTP also uses several security mechanisms to ensure that email messages are transmitted securely. One of the most common security mechanisms used by SMTP is TLS (Transport Layer Security), which encrypts email messages in transit to prevent them from being intercepted by unauthorized parties.

In addition to sending email messages, SMTP can also be used to receive email messages. However, SMTP is primarily used for sending email messages, while the POP (Post Office Protocol) and IMAP (Internet Message Access Protocol) protocols are used for receiving email messages.

How to use SMTP Test tool

Step 1: Open the "Test SMTP Online" tool

First, navigate to the website codezi.pro and click on the "Test SMTP Online" tool. This will take you to the tool's page where you can test your SMTP configurations.

Step 2: Enter SMTP server information

Once you are on the tool's page, you will see a form with several fields that you need to fill out. The first field is for SMTP server information, including the server name or IP address and the port number. You can get this information from your email provider or administrator.

Step 3: Enter sender and recipient email addresses

Next, you need to enter the sender email address and the recipient email address. These fields are self-explanatory, but make sure to enter a valid email address for both the sender and recipient.

Step 4: Send the test email

Once you have entered all the necessary information, click on the "Send Test" button. The system will automatically send a test email to the recipient's email address using the SMTP server information you provided.

Step 5: Check the results

After the test email is sent, you can check the results on the tool's page. The tool will display the status of the email sending process, including any error messages that may have occurred. If the test email is sent successfully, you should receive it in your recipient email inbox.


Using the "Test SMTP Online" tool on codezi.pro is an easy and convenient way to test your SMTP configurations without the need to write code or install any software. Simply enter your SMTP server information, sender and recipient email addresses, and click on the "Send Test" button to see the results. This tool is valuable for programmers and SMTP system installers who need to test their systems independently and save time in system testing. Additionally, the tool does not collect or store any information related to users' accounts and passwords, making it a secure option for email testing.