This guide will walk you through setting up your above.im email (above privacy suite) on your PC. The following instructions are written for Evolution Mail on Linux. The steps will be quite similar for other email clients if you are still on Windows/Mac.
Remember
IMAP is for Receiving/Incoming mail.
SMTP is for Outgoing/Sending mail.
Email Clients
Linux: Evolution Mail [Install with Flatpak], Mailspring, ThunderBird
Mac/Windows: Mailspring, Thunderbird
Open Evolution
You should be prompted to setup a new account
If not...
File -> New -> Mail Account
Click Next on the Welcome page!
Identity

Input your display name in Full Name. This will be displayed when you send emails.
Input your email address. user@above.im
Click Next
Receiving Email
Set Server Type to IMAP
Set server to mail.above.im with port 993
Encryption method: TLS on a dedicated port

Click Next
Receiving Options
Feel free to change these as you see fit. Default is fine for now, you can change these later.

Click Next
Sending Email
Set Server Type to SMTP with port 587
Set server to mail.above.im with
Change Encryption method to: STARTTLS after connecting

Click Next
Account Summary
No need to change the account name. This is only what is displayed on your PC in the evolution email client.

Next
Done

Apply!
Mail authentication request

You should be prompted to sign in. Keep "Add this password to your keyring" to automatically login when you open Evolution Mail.
Ensure your username includes @above.im
Enter your password
Click OK