Inbound Direct Delivery

Zivver messages are not standard emails. However, Zivver can securely deliver them as emails when you enable the Inbound Direct Delivery (IDD) option in the Zivver WebApp.

This option is useful if you do not want to first export the messages from Zivver. For example, you might want to store incoming messages in a document management system.

With Inbound Direct Delivery, the recipient’s computer stores incoming messages from Zivver domains as regular email. As a consequence, authentication with Zivver 2FA is not required to read them.

If necessary, ensure that you have an alternative secure storage method.

You can choose to have Zivver deliver inbound messages directly, rather than through Zivver client software. This option is only available if the connection security is adequate.

If you want to reply to an Inbound Direct Delivery message, you must use a Zivver client or use “Secure Direct Replies”.

Prerequisites

• TLS v1.2 or higher + a valid certificate, or
• DNSSEC + a valid certificate, or
• DANE
• The receiving domain(s) is/are claimed within your Zivver organization

Functional requirements

• Inbound Direct Delivery is enabled per domain, not per individual user
• You can enable Inbound Direct Delivery for all email addresses on the domain, or only for the Zivver accounts within your organization
• For a Shared Domain, Inbound Direct Delivery is always used only for Zivver accounts in your Zivver tenant

Procedure

Inbound Direct Delivery is a paid feature. Please contact your customer success manager or Zivver support to enable Inbound Direct Delivery.

1. Log in to the Zivver WebApp
2. Click Organization Settings
3. Expand General
4. Click Domains
5. Click on the Manage button next to the domain you want to enable IDD for
6. Scroll down to Inbound Direct Delivery (IDD)
7. Select Enable IDD for all recipients to enable IDD for everyone, Enable IDD only for recipients with a Zivver account to enable IDD only for the users within your Zivver organization or No IDD to disable IDD.

If you have enabled Inbound Direct Delivery for all your claimed domains in Zivver, please also apply the following step

8. Recommended: In Zivver Plugin Settings, configure the setting Save received Zivver messages unencrypted to Off, enforced.

Recommended: Activate Zivver Secure Direct Replies

After enabling IDD for your organization, you might want to allow your users to reply securely to IDD messages. The Secure Direct Replies manual explains how to set this up.

Updated on 2026-06-15