NOTE: You need premium membership to be able to use our IMAP/SMTP server.

This is how to setup your CounterMail-account on an Android device using K-9 Mail.
More info about K9 settings:https://github.com/k9mail/k-9/wiki/Manual

1. Start K-9 Mail by clicking on the icon.

2. Choose Next

3. Enter your email address. In this tutorial we are using usertest@countermail.com

You must enter your main account name in the username field.
Your password is not your regular Countermail-password. It is your IMAP-key.
Please see below how to get your IMAP-key.
https://support.countermail.com/kb/faq.php?id=90

4. Choose IMAP

5. Make sure that:

Username is your main email-address.
IMAP server is imap1.countermail.com
Security is SSL/TLS (always)
Authentication is Encrypted password (CRAM_MD5)
And then scroll down

6. Make sure that the Port is 993 and choose Next

7. Make sure that:

SMTP server is imap1.countermail.com
Security is SSL/TLS (always)
Port is 465
Require sign-in is checked
Username is your main account name (email-address).
And then choose Next

8. The are settings that you can choose whatever you like.

9.

First line: What name that is shown on the device
Second line: What name that is used when sending emails

To be able to encrypt/decrypt email you also need to install OpenKeyChain:
https://www.openkeychain.org