Let's Encrypt™ certificate renewals for Notes/Domino

LEND is software that automates the installation and renewal of Let's Encrypt™ SSL/TLS certificates for your Domino environment. Obtaining valid SSL/TLS certificates from Let's Encrypt is now a common option for websites. However, installing and maintaining up-to-date Let's Encrypt certificates on a Domino server can be a challenge. Let LEND take care of managing the process for you and keep your data private as it travels over Domino-supported HTTP, SMTP, POP3 and IMAP protocols.

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Privacy with internet communications

Whether you're using Domino as an email solution or hosting business-critical web and mobile applications, keeping your data private as it passes over the internet is imperative. LEND helps you achieve this by simplifying the process of installing and maintaining SSL/TLS certificates on your Domino servers.

How LEND Works

LEND is implemented as a Notes application (.nsf) that communicates directly with Let's Encrypt servers to create, renew and store SSL/TLS certificates in conjunction with Domino's native SSL keystore. Developed in Java, LEND does not require Certbot, Python or any other dependencies to be installed into your Domino environment. Simply define the servers and sites where certificates need to be deployed and let LEND's scheduled agent take care of the rest.


-- Get automatic LE certificate renewals for all of the Domino servers in your organization.
-- All renewal information is stored in a single .nsf that can be replicated among servers.
-- Configurable stopping and restarting of Domino services on a per-server basis.
-- Optionally notify administrators on warning or failures.

-- Version 2.0 now supports wildcard certificate creation and renewal (i.e., *.mydomain.com)!
-- Individual certificates can now be requested using a DNS challenge.
-- Automated email reminders and workflow for DNS-based certificate renewals.

-- Improved LEND Cacerts Utility for installing Let's Encrypt certificates into Domino's JVM keystore (cacerts), including automatic backup of existing cacerts.
-- Simplified setup process including a new visual applet for verifying proper configuration of your Domino server:

Start setup verification
Error in setup verification
Setup verification successful

Pricing and Licensing

LEND - Let's Encrypt for Notes Domino (version 2.1.0): $69

A license entitles you to use LEND on any number of testing, staging and production servers within your organization. In addition, a license comes with email support for up to one year from the date of purchase and includes any fixes/patches of the same release for up to one year.

30-Day Money Back Guarantee
LEND is backed by a 30-day money back guarantee. If you are dissatisfied with the product for any reason, you may get a full refund within 30 days of your purchase.
RHP Consulting strives to offer you a superior software product and user experience. We hope you enjoy the products and services we provide and we welcome your feedback and suggestions.

Server Requirements and Prerequisites

The recommended minimum version of Domino is version 9.0.1 Fix Pack 3. Let's Encrypt certificates use the SHA-2 algorithm which was delivered in Domino 9.0.1 Fix Pack 3. For additional information, please see http://www-01.ibm.com/support/docview.wss?uid=swg21418982 and https://letsencrypt.org/docs/certificate-compatibility.

For each server on which a Let's Encrypt certificate is to be installed, the IBM Kyrtool must also be installed in the Domino server program directory. The IBM Kyrtool may be downloaded from IBM Fix Central here:


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