Setting your allowlist and blocklist to control email support requests

Control email support requests by setting an allowlist and blocklist. Block or suspend specific users, or restrict ticket creation to certain domains. Use keywords like suspend: and reject: for precise control. Manage email headers to determine ticket handling. This feature helps you streamline support by managing who can create tickets and how requests are processed.





Location: Admin Center > People > Configuration > End users

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.
You must be an administrator to set the allowlist and blocklist.
This article covers the following topics:

Setting your blocklist and
allowlist
Rules for setting your blocklist and allowlist



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.

Note: Check the email headers of the emails you want to block or allow.
If both FROM and REPLY-TO are present, use the FROM value because this is used to identify
the user.
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
allowlist.
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

Consider the following rules and guidelines before 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.
When using keywords, type the keyword followed by a colon with no space after
the colon (for example, reject:megaspam.com). Separate
multiple entries with a space, and add the keyword before each entry (for example,
reject:randomspammer@gmail.com reject:megaspam.com
reject:spammerspace.com). See Allowlist and blocklist usage
examples.
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 reject: and
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
accounts.
A wildcard in the blocklist won't prevent tickets from being created by users with
organization-mapped domains; 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 suspend: and
reject: when using wildcards to suspend most users but
reject others. This applies to individual users only and not domains. If you add a
full email address with either the suspend: or
reject: keyword, the user is suspended or rejected
accordingly (unless the user already has a user profile).


If an address or domain conflict exists between suspend: and
reject:, then Zendesk defaults to suspension. For example,
entering * reject:gmail.com in your blocklist causes a suspension rather than a
rejection because the wildcard (*) applies to all addresses and domains, which
conflicts with the gmail.com reject entry.





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