---
title: How do I store mailbox passwords using non-reversible encryption?
description: Introduced in version 17.0.0, MDaemon has the ability to store user passwords using non-reversible encryption.  This protects passwords from the MDaemon admin, server admin, or a possible attacker.  
---

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# How do I store mailbox passwords using non-reversible encryption?

## Introduced in version 17.0.0, MDaemon has the ability to store user passwords using non-reversible encryption.  This protects passwords from the MDaemon admin, server admin, or a possible attacker.  

When enabled, passwords have a maximum length of 72 characters.   Passwords are also preserved, but not revealed, when importing/exporting to or from an MDaemon server. 

**Considerations**

- APOP and CRAM-MD5 authentication methods will not work with this feature enabled, as they depend on MDaemon being able to decrypt passwords
- MDaemon's weak password report feature is not compatible with this feature.

To enable storing password using non-reversible encryption: 

1. Select **Accounts**
2. Select **Account Settings**
3. Expand **Other**
4. Select **Passwords**
5. Click the **Store mailbox passwords using non-reversible encryption**  
   ![mdaemon email server menu to enable non-reversible encryption password storage option](https://knowledge.mdaemon.com/hs-fs/hubfs/KB%20Screenshots/password_encryption.png?width=688&name=password_encryption.png)
6. Click **Apply**
7. Click **Yes** to begin converting all passwords into a non-reversible, encrypted state.
8. Click **OK** on the pop-up when the process finishes.
9. Click **OK** to close the Account Settings window.

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