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How do I test SMTP authentication using telnet?

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How do I test SMTP authentication using telnet?

To test SMTP authentication via telnet:

  1. In a telnet client such as PuTTY, connect to the SMG appliance: telnet 587.
  2. Greet the mail server: EHLO mailserver.com.
  3. Tell SMG you want to authenticate with it: AUTH LOGIN.
  4. Paste the base64 encoded username.
  5. Paste the base64 encoded password for the username.

What does my outgoing server SMTP requires authentication mean?

SMTP Authentication is the mechanism by which the clients of an ISP identify themselves to the mail server through which they intend to send email. It is not possible for any person to send email via any mail server they choose; mail servers will only allow the sending of email by legitimate users.

How do I telnet from command prompt?

To use telnet, follow the steps below:

  1. First, find out the ip address of the server/main computer.
  2. Select the Windows key and the R key.
  3. In the Run box type CMD.
  4. Select OK.
  5. Type Telnet 13531.
  6. If you see a blank cursor then the connection is fine.

How do I test SMTP AUTH against a mail server using telnet?

Below are instructions on how to test SMTP AUTH against a mail server using Telnet and entering the commands by hand. The first thing you need to do is get a base64 encoding of your username and password. There are a couple ways to do this, the example below uses Perl :

How to authenticate on the SMTP server through Auth login?

To authenticate on the SMTP server through AUTH LOGIN, you need to convert the username and password from which the e-mail will be sent to the Base64 format. To convert string to Base64, you can use the PowerShell function: [System.Convert]::ToBase64String ( [System.Text.Encoding]::UTF8.GetBytes (“[email protected]”))

How do I connect to SMTP server via TLS using telnet?

Telnet doesn’t support SSL or TLS, so you need to use the OpenSSL tool to connect to the SMTP server via TLS. Let’s look at how to use OpenSSL to connect to the SMTP server via TLS and authenticate using AUTH LOGIN. In order to connect to the SMTP host from the command line with the SSL/TLS encryption, use the following command:

How to test email (SMTP) communication?

Using Telnet to test email (SMTP) If you are troubleshooting email connectivity and email reciept issues, it may be necessary to test basic SMTP communication for the problem that you are experiencing. For example, if you have problems sending email messages over SMTP to your ESA, you can test the SMTP connectivity by using Telnet on your local…

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