Typically, when an end user submits a support request by email, the email becomes a new ticket. However, you can control what happens to email support requests by using the allowlist or blocklist.
For example, you can block specific users from creating tickets or suspend their tickets so you can review them first. Or, you can only allow users from a particular email domain to create tickets. See Understanding the allowlist and blocklist for usage examples, limitations, and considerations.
This article covers the following topics:
Setting your blocklist and allowlist
Zendesk reads email headers of incoming support requests to determine whether an email should become a ticket or be suspended or rejected based on the rules you’ve configured.
To edit your blocklist and allowlist
- In Admin Center, click People in the sidebar, then select Configuration > End users.
- Enter your Allowlist and Blocklist settings. See Rules for setting your blocklist and
You can enter up to 10,000 characters in the allowlist and blocklist fields. If you are adding multiple email addresses or domains, separate them with a space.
- Click Save tab.
Rules for setting your blocklist and allowlist
- Leave the allowlist blank to allow all users to submit tickets to your Zendesk account, except those added to the blocklist.
- Use keywords or symbols with a blocklist or allowlist entry to make the restrictions
broader or more specific:
- To block or allow an entire email domain, do not include the "@" symbol. An email domain with "@" will not be successfully added to the allowlist or blocklist.
- To send support requests from specific users to the suspended tickets queue,
enter the keyword
suspend:in front of an email address or domain list in the blocklist.
- To completely block support requests from specific users, enter the keyword
reject:in front of an email address or domain list in the blocklist. Tickets will not be added to the suspended tickets queue, and there will be no record of the ticket in your Zendesk account.
- The keywords
suspend:apply only to support requests and don't prevent users from creating an account. See Limitations when using the allowlist and blocklist with other Zendesk channels.
- Add a wildcard (*) in your blocklist to suspend ticket submissions from all new
users except those added to the allowlist. This sends tickets from every user not added
to the allowlist into the suspended tickets queue, preventing new users from creating
- A wildcard in the blocklist won't prevent tickets from being created by users who already have profiles; however, blocklisting a domain or email address will. To prevent traffic from a specific user with a profile, suspend or delete the user.
- Use the keywords
reject:when using wildcards to suspend most users but reject others.
- If an address or domain conflict exists between
reject:, then Zendesk defaults to suspension.