To communicate via known encryption methods, a set of certificates is required. Hornetsecurity offers to purchase and manage those certificates for your convenience. For information on how to order certificates can be found in this article.
If you own valid certificates you can forward those to our customer support for implementation. Saving and managing public certificates is free of charge for our customers, any private certificates can be implemented and managed against an annual fee. For detailed information on the pricing, please contact our sales department.