[FormerlyS]

Hello HF, today I'll be showing you a tutorial to spoof an email address and send mail from it, trough the terminal.
Let's Start!

First off, we need to have a valid SMTP server to connect to.
An SMTP server is basically a post office that handles the mail received and sent, and the addresses they're coming from.
You can look up the SMTP server of your ISP on Google, or find one of a website.

Important is that the SMTP server should have no authentication, or that you're already authenticated, like with your own ISP's SMTP server.

Step 1
Here's how to find the SMTP server of a website.
Type this in terminal:

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nslookup

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set type=mx

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(url of your website, something like) www.google.com

You should get something like this:

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Non-authoritative answer:
google.com    mail exchanger = 40 alt3.aspmx.l.google.com.
google.com    mail exchanger = 50 alt4.aspmx.l.google.com.
google.com    mail exchanger = 30 alt2.aspmx.l.google.com.
google.com    mail exchanger = 20 alt1.aspmx.l.google.com.
google.com    mail exchanger = 10 aspmx.l.google.com.

Take the last one without alt: aspmx.l.google.com, and write it down.

Type ctrl+c to escape from the nslookup

Step 2
Now the mailing can begin.

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telnet aspmx.l.google.com 25

The 25 is the usual port for SMTP servers.

If you can't connect to it, repeat step 1 until you find a valid SMTP server.

You should get a response like:

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220 CPSMTPM-CMT104.kpnxchange.com kpnxchange.com Sun, 11 May 2014 11:41:52 +0200

Say hello to the SMTP server (you really have to do this, with 1 l though), followed by your name or some random name, this will not be the name of the sender.

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helo TR2000

It should respond with:

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250 CPSMTPM-CMT104.kpnxchange.com Hello [xx.xx.xxx.xxx]

Now define the sender:

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mail from: [email protected]

Respond should be:

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250 2.1.0 [email protected] OK

Then define the recipient (who you want to send the mail to):

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rcpt to: [email protected]

Respond should be:

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250 2.1.5 [email protected]

Step 3
After that, we can begin writing our mail.
Type:

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data
Subject: (your subject here)
From: Microsoft Support <[email protected]>
To: [email protected]

[Your message here]
.

The first 3 lines are the headers, you have to fill in the sender at from: and the recipient at To:
The subject is of course the subject.
Note: the receiver won't see the headers, (they're called headers), but you have to write them
Then type a double return and write your message, you can use returns too.
Then, to send your message, type a dot on a single line.
The CMD prompt should respond with:

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250 2.6.0 <[email protected]> Queued mail for delivery

And your mail is sent! Congratulations!



Now, to quit, simply press ctrl+c or type quit.

I hope you enjoyed my tutorial, if you have any questions, feel free to ask them 🤝

Troubleshooting:
If your mail is denied, try choosing another server

[Yelsdnah]

Didn't work for me... shame..
Worth a go I guess

[FormerlyS]

Didn't work for me... shame..
Worth a go I guess

What was the error you got?
It works for me...

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If this tutorial worked for you, please comment to keep the thread alive, thank you.