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

SPF:

1. Log into your HostMonster Control Panel.
2. Select the “DNS Zone Editor” icon in the “Domains” section.
3. Select the domain you’re modifying from the drop-down box.
4. Scroll down to the heading named “Add DNS Record“.
   • Host Record: Enter @ for your main domain.
   • TTL: Keep the default value: 14400
   • Type: Select the TXT type
   • TXT Value: Enter here your SPF record ( v=spf1 include:hostmonster.com -all)
5. Click on the “Add Record” button to create the record.

DKIM:

1. Log into your HostMonster Control Panel.
2. Select the “DNS Zone Editor” icon in the “Domains” section.
3. Select the domain you’re modifying from the drop-down box.
4. Scroll down to the heading named “Add DNS Record“.
   • 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 on the “Add Record” button to create the record.