This tutorial explains you how to use Usenet anonymously, which is
much older than the commercial Internet and you communicate securely
and anonymously, without any credentials required, globally.

Software we will use:

1. Tor Browser Bundle or Tor Expert Bundle
2. Mini Mailer
3. NewsWatcher
4. f-esub
5. esub for offline PC usage
6. your favorite encryption program

Step 1. Start Tor Browser Bundle (default port 9150) or Tor Expert Bundle (default port 9050)
Step 2. Configure Mini Mailer
   
        Enter the following in the Configuration tab:
   
        SMTP Host smtp.dizum.com
        SMTP Port 2525
        SOCKS5 Port 9050 (or 9150 if using Tor Browser)
        esub Key: your secret password shared with friends
        Omit auto headers: check the box

If there is no entry under Config File, such as dizum,
and you now press Save Config, the same values will be
set when you restart. However, you do not need to save
any data; you can always enter the values as needed.

        Templates: For regular newsgroups, this should look
        like this, for uniformity:

        From: Nomen Nescio <nobody@dizum.com>
        To: mail2news@dizum.com
        Subject:
        MIME-Version: 1.0
        Content-Type: text/plain; charset=UTF-8
        Content-Transfer-Encoding: 8bit
        Newsgroups:

        and for alt.anonymous.messages, which we will use like this:

        From: Nomen Nescio <nobody@dizum.com>
        To: mail2news@dizum.com
        Subject: <your esub>
        Newsgroups: alt.anonymous.messages

Save the template as dizum and later copy it into the Compose window.

Step 3. In the Compose tab paste the saved template and later
        insert your encrypted message from the offline PC, with
        a blank line between the headers and the message body.

Step 4. Once finished press Send Email and seconds later your
        anonymous message is posted to alt.anonymous.messages.

Step 5. That trusted parties can download your anonymous message(s)
        they start NewsWatcher with the following command:

        nw -latest > msg.txt

Step 6. Once msg.txt is downloaded there will be also in your
        current directory an alt.anonymous.messages.json file
        which keeps track of the donwnloaded news feeds.

Step 7. Transfer msg.txt to your offline PC and use f-esub to
        extract messages for you with:

        f-esub msg.txt key (key = your shared esub password)

        That's all. You now only need to copy/paste the message
        body from each extracted message and decrypt it.

Additional servers:

mail2news gateway entries for Mini Mailer's Configuration tab:

SMTP HOST xilb7y4kj6u6qfo45o3yk2kilfv54ffukzei3puonuqlncy7cn2afwyd.onion
SMTP PORT 25
SOCKS5 Port 9050
Config File tcpreset
Hashcash Bits 26
Hashcash Receiver mail2news
Omit Auto Header checked

and for the Template tab:

From: Mini Mailer <bounce.me@mini.mailer.msg>
To: mail2news@xilb7y4kj6u6qfo45o3yk2kilfv54ffukzei3puonuqlncy7cn2afwyd.onion
Subject: 
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Newsgroups:
X-Hashcash:

nntp servers for NewsWatcher:

news.dizum.net 119
news.mixmin.net 119
paganini.bofh.team 119

Please note: When posting to other groups instead of alt.anonymous.messages
make yourself comfortable with Usenet first and read news.newusers.questions
and post in a test group, like alt.test.test.