SMTP Test

SMTP Test Tool - Free SMTP Checker

Our SMTP test tool is made to help you test the working and operation of your SMTP server. You can specify your particular server using the hostname or the IP address. After that, you can specify the sending and receiving email addresses and simulate a standard email transfer to see if the SMTP server is working properly or not.

This SMTP checker benefits developers and web admins by allowing them to check and diagnose issues with their SMTP servers. Once the issues are resolved, the server can send emails without a problem.

What Exactly is SMTP? A Bried Explanation for New Users

If you are new to our SMTP test tool, here is a brief explanation to help you understand what SMTP is and why it is important in networking.

SMTP stands for Simple Mail Transfer Protocol. It is a protocol, or a method, for sending email messages from an email client to a server. It is also used when email data is being transferred from one server to another (before being passed on to the client on the receiving end).

SMTP utilizes TCP (Transmission Control Protocol) to connect the different services/clients so that the email data can be transferred. It can be understood as a protocol for standardizing email transfer. Every device that uses SMTP can easily communicate via email.

This is where our tool comes in. It allows you to test the functionality of your SMTP server (i.e., the one that is vital for email transfer) to determine whether or not it is working the way it is supposed to.

How to Use Our SMTP Tester? What to Input in the Various Fields?

Here is a guide on how you can use our SMTP tester tool.

1. First, open the SMTP tester tool at this URL: https://dnschecker.org/smtp-test-tool.php (if you’re reading this on the tool page itself, you’re already here).
2. Enter the hostname or the IP address of the SMTP server in the first field, i.e., on the top right.
3. Enter the port number into the following field. There are different port numbers used by SMTP servers, including 25, 465, 587, etc. You must add the port number used by the server you’re testing.
4. Next, enter the email address you’re sending the email from and the email address you want to send the email to. These two addresses will be used for the simulation message.
5. You can check the “Use Secure Connection” option if the SMTP server you’re testing requires it. If checked, you must select the respective protocol, i.e., TLS or SSL.
6. You can also check the “Use Authentication” option if the SMTP server requires it. When enabled, you must enter the username and password in the provided fields.

When all of these fields are filled, and the options are selected, click on the “Test SMTP” button to start the process.

What are the Benefits of Testing SMTP?

Here are some of the benefits of testing SMTP:

• Ensuring email deliverability: The main benefit of testing SMTP is that you can easily ensure whether or not emails can be delivered to the server. If the test is successful, the server can receive emails and forward them to the domains/addresses.
• Ensuring server security: If your SMTP server requires authentication for successful email deliveries, you can test the authentication protocol using our tool. You can enable the “Use Authentication” option and then enter usernames/passwords to ensure that only the cleared credentials can send emails.
• Ensuring server compatibility with various email clients: Another benefit of testing your SMTP server is that you can ensure your server’s compatibility with various email clients. You can simulate email messages from different types of email addresses to see if all of them are successfully delivered.

FAQs

What is the full form of SMTP?

The full form of SMTP is Simple Mail Transfer Protocol.

Is SMTP port 25 or 587?

Both ports 25 and 587 are used by SMTP. However, port 587 is popularly used nowadays instead of 25.

What is the difference between TLS and SSL?

SSL and TLS are both encryption protocols. TLS is the new and enhanced version of SSL. TLS has better and more advanced algorithms, while SSL relies on older ones.