Tap the icon or the menu and select Import Key from File . Navigate to and select your .opk file.

Confirm the import. If it’s a private key, you may need to enter the passphrase you created when the key was generated. : Open your mail client (e.g., K-9 Mail ). Go to Settings > Account Settings > End-to-end encryption . Select OpenKeychain as your OpenPGP app.

Choose the specific key you just imported to associate it with that email account.

To configure mail access using an .opk file—most commonly associated with for Android—you need to import your PGP (Pretty Good Privacy) keys. This allows you to sign and encrypt emails in apps like K-9 Mail or FairEmail . Step-by-Step Configuration Story

If your "Mail Access Config" also requires manual server entries, use these standard settings: IMAP (Receiving) SMTP (Sending) ://yourprovider.com ://yourprovider.com Port 465 or 587 Security SSL/TLS or STARTTLS Username Your full email address Your full email address

: Ensure your .opk file (your PGP public or private key) is saved to your device's internal storage. Import to OpenKeychain : Open the OpenKeychain app.