To end the message, put the only dot (.) in a single line and press, it mean that we already finish composing the message and ready to send it.Ħ. SUBJECT: Hi v4L, this is hacking- Īnd continue with the email body content… If email sender and email recipient already OK, we can compose the message. RCPT TO: recipient also should return the 250 message or OKĥ. MAIL FROM: hacking- the sender was OK, it should replied 250. After get reply message 250 from the mail server, we can start define the email sender and email recipient. Now let's greet this mail server.Īfter we greet the mail server, we need to make sure that the server replying 250 or OKĤ. Yes we can connect to that mail server(message 220). and run the telnet command to connect to the mail server.Ģ5 is the SMTP port, most of email server use this port to sending email.ģ.
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From the intro we know that SMTP use port 25. We will do from client 1 because from this client we can send email anonymously.Ģ. Let me show you the network topology where we do this. In this tips and trick, the case is we are inside the ISP network.
#HOW TO USE TELNET KALI LINUX HOW TO#
If you try this tutorial on windows 7 and your telnet client is disabled by default, you can enable it by read the tutorial how to enable telnet on windows 7.ġ. Let's start the tips and trick □ Step by step how to send email using telnet:īelow is the information I will use in this tips and trick: The good and also the bad thing is their SMTP(Simple Mail Transfer Protocol) server doesn't need an authentication if you are inside the ISP network.
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Usually when you subscribe the internet connection to ISP, they will give you access to their SMTP server or they give you one email address for you to use (In Indonesia some internet provider usually will give you 1 email account when you subscribe, that's my experience □ ). Make sure we have access to a SMTP server.
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SMTP was first defined by RFC 821 (1982, eventually declared STD 10), and last updated by RFC 5321 (2008) which includes the Extended SMTP (ESMTP) additions, and is the protocol in widespread use today. Simple Mail Transfer Protocol ( SMTP) is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks. The way we sending email in this tutorial is a little different than sending email using Gmail or Yahoo, because we will try to sending email by using a command prompt or terminal.ĭo not confused with the title How to send email using telnet in kali linux, because the telnet protocol was same for all operating system.įirst, we need to know about what is SMTP.