To set up SPF and DKIM for Bluehost, follow the steps given below:

SPF:

1. Log in to your Bluehost control panel.
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. If you’re removing an existing SPF record, scroll down to find it in the TXT record section to find it and click Delete.
5. To add a new SPF record, enter this information under Add DNS Record at the top of the Zone Editor:
   • Name: Type your domain name (without the www)
   • TTL: 14400
   • Type: TXT
   • TXT Value: This is where you would paste in your new SPF record.
6. Click Add Record.

DKIM:

1. Log in to your Bluehost control panel.
2. Select the DNS Zone Editor icon in the Domains section.
3. Select the domain you want to modify from the drop-down menu.
4. Scroll down to the heading named Add DNS Record. In the Add DNS Record area, enter your new DNS entry such as:
   • Host Record: Enter your subdomain 
   • TTL: Keep the default value: 14400
   • Type: Select the TXT type
   • TXT Value: Enter here your DKIM/ domain key record 
5. Click Add Record to create your record.