Issuing the Telnet command telnet [domainname or ip] [port] will allow you to test connectivity to a remote host on the given port. This tutorial shows how to connect to SMTP mail server and send an Email using the ‘telnet’ command.

Tell the server you want to authenticate with it: AUTH LOGIN MAIL FROM: 250 2.1.0 MAIL ok We can send the RCPT TO command now that we the MAIL FROM command was sent.

One of the biggest perks of Telnet is with a simple command you can test whether a port is open. Here are simple steps on how to send an email using telnet. SMTP sta per Simple Mail Transfer Protocol e potremmo definirlo rozzamente un insieme di regole e di comandi per inviare messaggi di posta elettronica.

You can also use it to test that your server is not an open-relay.

Now connect to the mail server using Telnet: telnet 25. Below are instructions on how to test SMTP AUTH against a mail server using Telnet and entering the commands by hand.

In the command prompt, Type the following and press Enter key. If the command is successful, you will see something like this: server: 220 ESMTP server ready Tue, 20 Jan 2014 22:33:36 0200.

This command defines the address to which bounces are delivered. In order to perform the following commands, all you will have to do is connect to the mail server using Telnet with the IP or DNS name of the server on port 110 (Example: telnet 110). The Telnet solution is an effective method for configuring servers e.g.

Step 1: Open a connection from your computer to an SMTP mail server $ telnet smtp.domain.ext 25 […] C:\Documents and Settings\Nicolas > telnet 587 220 ESMTP 10sm8014744eyd.42 ehlo nico at your service, [] 250-SIZE 35651584 250-8BITMIME 250-STARTTLS 250-ENHANCEDSTATUSCODES 250 PIPELINING AUTH … Sending Email via Telnet Using SMTP Authentication In some cases, in order to test or diagnose e-mail service, an administrator has to check the sending of emails through their Exchange servers (and other email servers) from certain hosts.If a server doesn’t require an authentication (open-relay server), you can send an e-mail from telnet command prompt. With these commands you can test email flow at a very granular level to determine what's broken and where. Specifies the port number or service name. telnet 25. Issue the following command in the Command Prompt: telnet [domain name or ip] [port] Entrez la commande telnet 25 où est le nom du serveur du Protocole Simple de Transfert de Courrier ou serveur SMPT de votre client de messagerie (par exemple, et 25 est le numéro de port utilisé par le service du Protocole Simple de Transfert de Courrier. Telnet is an external command that is available for the following Microsoft operating systems as telnet.exe.

Inviare e-mail via telnet Quando spedisci un messaggio di posta elettronica (di solito tramite un client e-mail), stai usando il protocollo SMTP.

In the command prompt, type: telnet [mail server FQDN or IP] [mail server port] e.g.

To send an email using telnet. By inserting commands through Telnet, you can control remote computers as if they were right in front of you.

Displays operating parameters. Esempio: telnet 587 (consente di testare la porta SMTP se il programma di posta elettronica non consente di inviare e-mail) In Android utilizzare l'applicazione Simple Telnet Client gratuita che consente di testare in modo molto semplice tramite due campi da compilare (con e la porta 143 ). a web server : changes to the directory structure, the file access rights, or the password, can be implemented quickly and easily. What will be returned from each command is a base64 encoding of the username and password; save these as you will need them later.


telnet 25 , or. This a great way to test your mail server configuration such as exim, sendmail or postfix without a need for a email client. You can use telnet (the command line utility) to test whether your email (SMTP) server is receiving emails. It can also be used to check the availability of certain ports or to detect errors on e-mail servers (SMTP, port 25) by sending an e-mail directly from the server. telnet [host [port]] Specifies the hostname or IP address of the remote computer. Commands available through the actual telnet program.

... the period alone on the line tells the SMTP server you're all done with the data portion and it's clear to send the email. Open the command prompt (Typically Start > run > cmd) type: telnet mail.server 25. where "mail.server" is the name of your mail server.

Step 4: Test SMTP relay. You will receive the reply like,