# Squirrel for HCL Domino (Freeware)
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
{% hint style="info" %}
Follow development at Mastodon [#Squirrel4Domino](https://swiss.social/tags/squirrel4domino)
This tool is also shown on the [*HCL Domino Marketplace*](https://hclsofy.com/domino)
{% endhint %}
```
> 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 / andy.brunner@k43.ch - All Rights Reserved
03.04.2026 17:07:50 Squirrel: Java VM heap size configuration: Maxiumum: 256 MB / Used: 22 MB / Free: 233 MB
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 jsmith@hotmail.com (Size 689 KB)
03.04.2026 17:07:50 Squirrel: POP3S message forwarded to Lee Chu/ACME from lchx815@gmx.net (Size 286 KB)
```
## Use Cases
1. 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.
2. 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](https://squirrel.k43.ch/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](https://unsplash.com/@shane_young?utm_source=unsplash\&utm_medium=referral\&utm_content=creditCopyText) on [Unsplash](https://unsplash.com/de/s/fotos/shane-young-squirrel?utm_source=unsplash\&utm_medium=referral\&utm_content=creditCopyText)
## Authors
Squirrel is a joint development of [iota systems GmbH](https://iota.ch) (HCL Notes Front-End) and [Andy Brunner](https://k43.ch/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](https://squirrel.k43.ch/quick-start/contact-problem-reporting).
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 😊
Copyright (c) iota systems GmbH / - All Rights Reserved.
