Squirrel for HCL Domino (Freeware)

Internet Mail Collector for HCL Domino

Similar to squirrels gathering food like nuts, seeds, acorns and berries, this server program collects email messages from Internet mail servers and forwards them to the HCL Domino server.

Free Download

Follow development at Mastodon #Squirrel4Domino

This tool is also shown on the HCL Domino Marketplace

> Load RunJava JAddin Squirrel
03.04.2026 17:07:50   JVM: Java Virtual Machine initialized.
03.04.2026 17:07:50   RunJava: Started JAddin Java task.
03.04.2026 17:07:50   Squirrel: The Internet Mail Collector for HCL Domino - Version 2026.04.02
03.04.2026 17:07:50   Squirrel: Copyright iota systems GmbH / [email protected] - All Rights Reserved
03.04.2026 17:07:50   Squirrel: Java VM heap size configuration: Maxiumum: 256 MiB / Used: 22 MiB / Free: 233 MiB
03.04.2026 17:07:50   Squirrel: License key valid for 10 mail account subscriptions until 2026-12-31
03.04.2026 17:07:50   Squirrel: IMAPS message forwarded to Joe Smith/ACME from [email protected] (Size 689 KB)
03.04.2026 17:07:50   Squirrel: POP3S message forwarded to Lee Chu/ACME from [email protected] (Size 286 KB)

Use Cases

Company A - a long-time HCL Domino customer - buys company B, which uses Exchange. During the migration, Squirrel allows the administrator to merge all Exchange/MIME emails from company B into HCL Domino of company A.
In addition to his own HCL Notes email, the HCL Domino administrator is responsible for several external MIME mail boxes he needs to monitor. To be able to process these MIME emails in his HCL Domino in-box, he uses Squirrel to consolidate message boxes.

Description

There is no built-in function in HCL Domino to collect messages from an Internet mail server and to forward them to the user mail database. This server add-in allows the administrator to define the Internet mail servers which are allowed to be used for mail retrieval. The user or the administrator then defines the mail account subscriptions based on these connections. Squirrel works completely in the background while periodically connecting to Internet mail servers and processing the messages for users.

Squirrel reads POP3 and IMAP mail servers through standard Java Mail API calls. After processing the message, Squirrel creates a Notes mail document and stores it in the mailbox of the HCL Domino server it is running on without accessing the users mail database. All further processing and delivery of these email message is handled by the HCL Domino mail router.

Features

Runs on all server platforms supported by HCL Domino 9.0.1 FP8 or higher
Support for multiple HCL Domino servers in a domain
Support for IMAPS, IMAP, POP3S and POP3 Internet mail servers
Support for OAuth 2.0 authentication with XOAUTH2 login (see OAuth 2.0 Support)
HCL Domino password encryption enforced for all email accounts
Freeware version for up to three active email accounts

Freeware / Community Edition

Squirrel may be used as a freeware version with a limit of three active mail accounts.
You may contact us for a “Community Edition” license. This license is restricted to private or non-commercial use only.

Credits

Foto by Shane Young on Unsplash

Authors

Squirrel is a joint development of iota systems GmbH (HCL Notes Front-End) and Andy Brunner (HCL Domino Back-End). They both cooperate in the future development, maintenance and support. If you encounter any issue or if you have a suggestion, please let us know.

Created with love and passion in the beautiful country of 🇨🇭 Switzerland. This software shall be used for Good, not Evil. As far as we know, no squirrel or any other animal was harmed in the making of this software 😊