---
schema_version: "1"
id: df8f34aa5b29c37833bf96a1bc5cc5190ea5a578521bc2ae2973cca8a09adea4
title: Identity System Setup for Open Time Email
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_pers_identity_open_time_email.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_pers_identity_open_time_email.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 032f824323d6ae765730323f117041211e85a83b8d2370dc2dc3e1732d6a3157
description: To create unified customer profiles for each of your customers, use Personalization’s identity system to configure the identifiers in your Open Time Email campaigns. To merge user profiles from various sources, you designate an identity type to use when matching users between your email service provider and Personalization. You can use only one identity type. If you send multiple identifiers in an Open Time Email campaign, Personalization ignores all but the designated identity type.
products:
  - Marketing
  - Salesforce Personalization
release: "264"
---
# Identity System Setup for Open Time Email

To create unified customer profiles for each of your customers, use Personalization’s identity system to configure the identifiers in your Open Time Email campaigns. To merge user profiles from various sources, you designate an identity type to use when matching users between your email service provider and Personalization. You can use only one identity type. If you send multiple identifiers in an Open Time Email campaign, Personalization ignores all but the designated identity type.

- **[About Identity System Setup for Open Time Email](https://help.salesforce.com/s/articleView?id=mktg.mc_pers_identity_open_time_email_about.htm&release=264.0.0&type=5)**  
    Learn about setting up the identity system for open time email campaigns.
- **[Configure the Identity System for Open Time Email](https://help.salesforce.com/s/articleView?id=mktg.mc_pers_identity_open_time_email_configure.htm&release=264.0.0&type=5)**  
    Set up the identity system for open time email.

#### See Also

- [Open Time Email Campaigns](https://help.salesforce.com/s/articleView?id=mktg.mc_pers_email_campaign.htm&release=264.0.0&type=5 "Use open time email campaigns to deliver personalized content and product recommendations each time a recipient opens an email. Using existing email campaigns that you send using your mail marketing service, Open Time Email campaigns deliver real-time personalized content to each member of your subscriber list.")