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At Zoho Marketing Automation, 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. Learn more 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. 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.
  1. Add your sender domain.
  2. Copy the SPF and DKIM TXT records from your Zoho Marketing Automation account.
  3. Add the SPF and DKIM TXT records to the DNS server.
  4. Authenticate your domain in your Zoho Marketing Automation account after adding the SPF and DKIM TXT records to the DNS server.
Let's dive deep and learn more about setting up SPF and DKIM TXT records.

Add your sender domain   

  1. Log in to your Zoho Marketing Automation account.
  2. Click Settings next to the notification icon.



  3. Under Marketing Channels, click Email.



  4. Select the Senders and Authentication tab and click Add Sender.



  5. Enter the email address patricia.b@zylker.com.
  6. Add multiple sender addresses separated by a comma, semicolon, space or enter each address on a new line.



  7. Click Save.
  8. Zoho Marketing Automation identifies the sender address as patricia.b@zylker.com and its domain as zylker.com as shown below.



  9. To verify your email addresses, log in to your email client and open the verification email sent by Zoho Marketing Automation.
  10. Click the Verify your email address button in the email to complete the verification process.
  11. Once verified, you will find your sender address (Example: patricia.b@zylker.com) listed under the Senders and Authentication tab.

Copy SPF and DKIM record values from Zoho Marketing Automation

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.
  1. Click Settings next to the notification icon.



  2. Under Marketing Channels, click Email.



  3. Select the Senders and Authentication tab and click Setup next to your domain.



  4. On the Setup SPF/DKIM page, click the Copy icon next to the SPF and DKIM text records.


Pasting the SPF and DKIM records in BlueHost

To add the SPF TXT record for your domain, follow these steps:
  1. Log in to your BlueHost account.
  2. Go to the Domains menu at the top and click the Zone Editor submenu.
  3. Select your domain name from the drop-down.
  4. To add a new SPF record, enter this information under Add DNS Record at the top of the Zone Editor:
    1. Type: TXT
    2. Name: Enter the domain name
    3. TXT : Paste the SPF TXT record displayed in the SPF/DKIM Setup screen
    4. TTL: Enter how long the server should take to cache the information
      Example: v=spf1 include:zcsend.net include:sender.zohobooks.com ~all
      5. Click Add Record.
Notes
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,
  1. Locate the record you added and click the Modify Record button.
  2. To the existing record details, add "include:zcsend.net" after "v=spf1". (Example: v=spf1 include:zcsend.net include:spf.zylker.com ~all)
  3. Click Modify Record.
If you are using Zoho Marketing Automation from the regions below, add the respective TXT value instead of include:zcsend.net.
  1. EU region - include:eu.zcsend.net
  2. India - include:zcsend.in
  3. China - include:zcsend.net.cn
To add the DKIM TXT record for your domain, follow these steps:
  1. Log in to your BlueHost account.
  2. Go to the Domains menu at the top and click the Zone Editor submenu.
  3. Select your domain name from the drop-down.
  4. To add a new DKIM record, enter this information under Add DNS Record at the top of the Zone Editor:
    1. Type: TXT.
    2. Name: Enter the DKIM host name displayed in the SPF/DKIM Setup screen. (Example:2232._domainkey)
    3. TXT Value: Paste the DKIM TXT record displayed on the SPF/DKIM Setup screen of your Zoho Marketing Automation account.
    4. TTL: Enter how long the server should take to cache the information
      5. Click Add Record.
Notes
Note:
  1. If your DNS has already mentioned the domain name, enter the domain key alone in the Host Name field.
  2. If your sub domain is mail.zylker.com, the domain key should be "2232._domainkey.mail"
Click here to learn more about managing your DNS record resource in your BlueHost account.

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:
  1. Click the Settings icon next to the notification icon.



  2. Under Marketing Channels, click Email.



  3. Select the Senders and Authentication tab.
  4. Locate your domain and click Setup.
  5. Click Authenticate.