How do I send an email using telnet 25?

How do I send an email using telnet 25?

How to send email using telnet

  1. Open your command prompt.
  2. Now, connect with telnet using the following command: telnet 25.
  3. Type ehlo
  4. Type mail from: [email protected]: mail from: [email protected]

How does Telnet test SMTP operations?

  1. From within a Telnet session, type: mail from: followed by the e-mail address of the recipient (without a space), and then press Enter on the keyboard.
  2. Type: rcpt to: followed by the e-mail address of recipient, and then press Enter.
  3. Type: data, and then press Enter.
  4. Type: subject:Test, and then press Enter.

How do I test SMTP?

To test the SMTP service, follow these steps:

  1. On a client computer running Windows Server or Windows 10 (with telnet client installed), type. Telnet at a command prompt, and then press ENTER.
  2. At the telnet prompt, type set LocalEcho, press ENTER, and then type open 25, and then press ENTER.

How to connect to a SMTP server using telnet?

To connect to an SMTP server by using Telnet on port 25, you need to use the fully-qualified domain name (FQDN) (for example, or the IP address of the SMTP server. If you don’t know the FQDN or IP address, you can use the Nslookup command-line tool to find the MX record for the destination domain.

Can a SMTP command be capitalized in Telnet?

The SMTP command verbs in this example are capitalized for clarity. You can’t use the backspace key in the Telnet session after you connect to the destination SMTP server. If you make a mistake as you type an SMTP command, you need to press Enter, and then type the command again.

Is it possible to test a mail server with telnet?

This post was published 10 years, 5 months ago. Due to the rapidly evolving world of technology, some concepts may no longer be applicable. Despite having been around for a long time, telnet is an invaluable tool for testing a mail server.

What are the ports for a SMTP server?

Port 23 won’t get you into your SMTP server. SMTP uses three ports: 25, 465, and 587. All of the other advice pages on the web that include tips on how to access SNMP with Telnet tell you to use port 25.

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