There are a range of keywords available to send encrpyted emails, enabling companies to balance convenience and security depending on the recipient (personal or business), email content and any attachments. We will start with the standard keyword '#private' and list the alternatives thereafter.
To send a private email, simply compose the email as normal but include '#private' anywhere within the email subject or body. Then hit ‘Send’ just like normal. The email and any attachments will automatically be encrypted. Emails sent to personal email accounts (and business accounts which do not support TLS email) will be encrypted and the recipient will receive a notification email - for more information, see here. Emails sent to business accounts will be encrypted using TLS email encryption.
Below is an example email using #private:

Alternative keywords:
'#private-all' will encrypt both email content and attachments to all recipients - this includes both personal email accounts (and business accounts which do not support TLS email) and business recipients;
'#private-attachments' will encrypt attachments only to all recipients - this includes both personal email accounts (and business accounts which do not support TLS email) and business recipients;
'#private-reduced' will encrypt attachments only to personal email accounts (and business accounts which do not support TLS email);
'#private-plus' will encrypt both email content and attachments to personal email accounts (and business accounts which do not support TLS email) and encrypt attachments only to business recipients;
'#private-none' will send a normal email without encryption but will create a record of that email in the Keepd® portal.