You don’t actually need the Chatmail server QR code.
- Pretend you have an account on the Chatmail server
a. Make up a 9-character random string, and call it your user name. If the server has the domain name nine.testrun.org, use [9-char random string]@nine.testrun.org as your email address.
b. Make up a password. A string of 12 random characters is standard. - In the DC client, pick “Create New Profile”>“Use Other Server”>“Classic E-Mail Login”
- Fill in your made-up address and password.
Everything works. Except in the unlikely event that that e-mail address already exists, the server will register it on first login
- If you did not fill in the “Your Name” field to give yourself a profile name before clicking “Classic E-Mail Login”, then go to the no-name profile, click on the cog icon to open settings, scroll down to “Edit Profile” and fill out your name. You can also add a bio. These can both be changed later.
The strings of 9 and 12 random characters are what would be automatically assigned if you were using the account creation code. You can choose a non-random account name, but it will be more conspicuous.
You can also use a secure passphrase instead of a password. Do not use anything that is on any of the lists of common passwords, or reused from elsewhere, or easy to guess, even if someone knows you and what you call your cat. The password will be stored in the DC client and its backups, so you probably don’t need to remember it.