At Zoho Campaigns, we strongly urge you to authenticate your domain by implementing SPF and DKIM.
SPF
Sender Policy Framework is an authentication technique that helps receiving email servers identify legitimate email senders and prevent spam entering the inbox of email recipients.
Click
here to learn more about SPF.
DKIM
DomainKeys Identified Mail (DKIM) is an email authentication mechanism that uses the "Public key cryptography" technique to ensure that the email message was not modified during transit.
Click
here to learn more about DKIM.
To successfully authenticate your sender domain, you need to set up your SPF and DKIM TXT records. Authenticating your sender domain is a simple process that involves four easy steps.
- Add your sender domain.
- Copy the SPF and DKIM TXT records from your Zoho Campaigns account.
- Add the SPF and DKIM TXT records to the DNS server.
- Verify your domain in your Zoho Campaigns account after adding the SPF and DKIM TXT records to the DNS server.
Let's dive deep and learn more setting up SPF and DKIM TXT records.
Add your sender domain
- Log in to your Zoho Campaigns account.
- From the Navigation Toolbar, choose Settings.
- Select Manage Senders under Deliverability.

4. Click the Add Sender button on the top-right corner of the screen.
5. Type the email address in the box. You can enter up to 5 sender email addresses.
6. Click the
Send Verification Email button to receive verification emails at the email address you have provided.
7. To verify your email addresses, log in to your email client and open the verification email sent by Zoho Campaigns.
8. Click the Verify your email address button in the email to complete the verification process.
9. Once verified, you will find your sender address (Example:
patricia.b@zylker.com) listed under the Manage Senders section and the domain (zylker.com) listed under the Domain Authentication section.
Copy SPF and DKIM record values from Zoho Campaigns
Only the organization's admin has the privilege to access domain authentication settings. You can contact your organization's admin and ask them to help you authenticate your sender domain.
- From the Navigation Toolbar, choose Settings.
- Select Domain Authentication under Deliverability.

3. Click Setup on the extreme right of the row against the domain that you wish to authenticate.
4. On the Setup page, click the Copy button next to the SPF and DKIM records. First copy the SPF, paste it in your domain's DNS settings. Then do the same for DKIM.
Pasting the SPF and DKIM records in Cloudflare
To add the SPF record for your domain, follow these steps:
- Log in to your Cloudflare account.
- Click the appropriate Cloudflare account for the domain where you will add records.

- Click the Domain name for which you want to add SPF and DKIM records.

- From the left menu, click DNS, and click Records.

- Click the Add record button in the screen that appears.

- Provide the following information:
- Type: TXT.
- Name: Enter @.
- TTL: Enter how long the server should take to cache the information, or leave it as Auto.
- Content: Paste the SPF record you copied from Zoho Campaigns in this field.
- Click Save.

Example: v=spf1 include:zcsend.net include:sender.zohobooks.com ~all
Note: A sender domain can have only one SPF TXT record. We recommend not to add a new record if you already have one. If you have an existing SPF TXT record,
- Select the domain you want to edit.
- Click the value field of the record you want to edit.
- To the existing record details, add "include:zcsend.net" after "v=spf1". (Example: v=spf1 include:zcsend.net include:sender.zohobooks.com ~all)
- Click Save.
If you are using Zoho Campaigns from the regions below, add the respective TXT value instead of "include:zcsend.net".
- EU region - include:eu.zcsend.net
- India - include:zcsend.in
- China - include:zcsend.net.cn
You'll follow the same steps for adding DKIM record. Just the record you paste will be different.
- Click Add record again.

- Provide the following information:
- Type: TXT.
- Name: Copy the DKIM host name displayed in the SPF/DKIM Setup screen in Zoho Campaigns and paste it here. (Example: 2232._domainkey)

- TTL: Enter how long the server should take to cache the information, or leave it as Auto.
- Content: Paste the DKIM record you copied from Zoho Campaigns in this field
- Click Save.

Note:
- If your DNS has already mentioned the domain name, enter the domain key alone in the Host Name field.
- If your sub domain is mail.zylker.com, the domain key should be "2232._domainkey.mail"
Verify the sender domain
After the SPF and DKIM records for your domain have been added to the DNS servers, follow these steps to verify your domain:
- From the Navigation Toolbar, choose Settings and select Domain Authentication.
- Click the Setup button on the far-right corner of your domain.
- Click Verify Domain.
If the records are not published in the DNS, you can check the reason and how to fix it on the same screen.
