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Supports SPF Supports DKIM

How to Set Up/Modify SPF for Zendesk

The following description addresses how to update a Domain Name Service (DNS) record to use SPF with your custom domain in Zendesk.

To utilize a custom domain, the Zendesk provider requires an SPF TXT record be added to the DNS record. This TXT record is then used by DNS to recognize email servers allowed to send messages on behalf of your custom/third-party domain. To determine whether a correspondence from the specified domain comes from an authorized messaging server, the recipient system relies on the implemented SPF TXT record. At that point, the message is either accepted, quarantined, or rejected by the email receiving system.

To implement SPF authentication for your domain, you will need access to your DNS records in the domain hosting account. Important: If you already have an SPF record, then you should modify that existing record. You must not have more than one SPF record.

For convenience, be sure to log in to your Zendesk account to verify your domain and copy your TXT records. Zendesk utilizes an include mechanism during the set-up process. For example, the following scenario is the most common and would pass SPF:

v=spf1 ?all

If you send email from IP for the domain “” and that domain’s SPF record includes and the IP address passes the SPF record, this mechanism will pass.

As mentioned, if you already have an SPF record set up (and because only one SPF record is allowed per domain), you can simply add a reference to Zendesk to it. For example, instead of having two separate records, combine them into one:

v=spf1 ~all

How to Set Up/Modify DKIM for Zendesk

Zendesk allows DKIM authentication. Email service providers that support DKIM check inbound email to verify whether an organization that claimed to have signed a message actually did. To create a DKIM record for your domain name, do the following:

1. Log in to your domain registrar’s control panel

2. Find option to change DNS records

3. Locate CNAME records for your domain

4. Create CNAME record with values:

    Host Record – (Substitute your domain name as needed)

    Points To –

5. Create second CNAME record with above values (*Use “2” instead of “1” in this record)

To enable digital signatures in Zendesk, follow these steps:

1. Click Manage and select Email from Channels category

2. Scroll to Custom Domain for DKIM and select Enable

3. Click Save

As a user of this outbound email provider, Zendesk customers are afforded DKIM signing because it supports that mechanism. By utilizing Zendesk’s self-service portal, you can manually set up DKIM at your convenience via CNAME records mentioned above. Overall, this Zendesk product provides beneficial components (e.g., DKIM signing, self-service set up with CNAME records) that result in a streamlined process.

DKIM/SPF Setup Highlights

The below sections highlight notable characteristics of setting up DKIM and SPF for this provider as well as highlighting advanced settings if offered by this Outbound Email Source.


SPF Include Tag Required

This outbound email provider uses an include mechanism to add this provider's IP space to your SPF. To get fully set up with SPF for this provider, you will need to take the provided “include” domain and add it to your SPF record. An example of an SPF record without an include tag is compared to one with the tag added below (the include tags added are denoted in bold).


Initial SPF Record:

HOST TEXT v=spf1 ~all


SPF record include added:

HOST TEXT v=spf1 ~all


This outbound email provider does not allow a custom Return-Path address to be set. 


Supports DKIM Signing

Yes, this outbound email provider supports DKIM signing.

DKIM Setup via CNAME

This specific email provider relies on a CNAME record (or multiple records) for DKIM set up. Below is an example a typical  CNAME Record for setting up DKIM. The HOST section will typically contain a unique name followed by the domain name you are creating the record for (In the below "s1.domainkey" is the unique name followed by the domain of "". The ADDRESS section will outline where mail receivers should look for a DKIM record for the domain. Both of these values are typically auto generated when you setup DKIM via an outbound email source.



No Custom DKIM records

This outbound email provider does not allow for any modification to the DKIM records they have provided to you.

DKIM Setup Process: Self-Service Dashboard

This email provider offers a self-service dashboard where DKIM records will be setup for the account. To get DKIM setup for this provider you will login to your account at this provider and proceed to the DKIM setup area.