Introduction
SPF (Sender Policy Framework) records are crucial for email authentication, helping prevent email spoofing and improving deliverability. Manually updating SPF records for each cPanel user can be time-consuming. This guide shows you how to automate this process using a single command.
What You’ll Need
- Root SSH access to your cPanel server.
- Basic understanding of terminal commands.
The Command Explained
Use the following command to update SPF records for all non-system cPanel users at once:
for user in $(cut -d: -f1 /etc/passwd | grep -v "nobody\|mysql\|system" | sort); do /usr/local/cpanel/bin/spf_installer $user "include:relay.mailchannels.net,include:smtp.mellow.solutions" 0 1 1; done
Breaking Down the Command
- User Selection
cut -d: -f1 /etc/passwd | grep -v "nobody\|mysql\|system" | sort
cut -d: -f1 /etc/passwd
: Extracts all usernames from the system’s user list.grep -v "nobody\|mysql\|system"
: Excludes system users (likenobody
,mysql
, orsystem
) to target only cPanel accounts.sort
: Orders the list alphabetically for consistency.
- SPF Update Command
/usr/local/cpanel/bin/spf_installer $user "include:relay.mailchannels.net,include:smtp.mellow.solutions" 0 1 1
$user
: Iterates through each valid cPanel username."include:relay.mailchannels.net,include:smtp.mellow.solutions"
: The SPF record to set. Replace these values with your own if needed (e.g., your email service providers).0 1 1
: Flags for thespf_installer
script (refer to cPanel documentation for exact meaning, but typically:0
: Do not force overwrite.1 1
: Save and enable the SPF record.
How to Run the Command
- SSH into your server as the root user.
- Copy and paste the command into the terminal.
- Press Enter to execute.
Important Notes & Precautions
- Backup First: Always backup your server’s configuration before making bulk changes.
- Verify the SPF Syntax: Ensure the SPF record values (
include:relay.mailchannels.net
, etc.) are correct and compatible with your email service providers. - Check Record Length: SPF records must not exceed 255 characters. Test the final record using tools like MXToolbox.
Post-Execution Steps
- Check SPF Records:
- Log in to WHM > Email Authentication > Manage SPF Records.
- Verify that the SPF records for all users now include the new entries.
- Test Deliverability: Send test emails to confirm no delivery issues arise.
Troubleshooting
- Command Errors: If the script fails, ensure:
- The
spf_installer
tool is installed (common in cPanel versions 11.50+). - You’re running the command as root.
- The
- Existing SPF Entries: The command may overwrite or append to existing records. Review each user’s SPF settings if needed.
Why Automate This?
This method saves hours of manual work, ensuring all accounts comply with your email provider’s requirements in seconds.
Final Note
Automating SPF updates is efficient, but always prioritize accuracy. Mistakes in SPF records can lead to email delivery failures.
Ready to implement? Copy the command, test it on a staging server if possible, and ensure your SPF syntax is validated.
Share this guide with your team or save it for future reference. Let us know if you need further assistance!
Tags: #cPanel, #SPF, #EmailAuthentication, #Automation
This guide ensures your SPF records are updated seamlessly, enhancing email security and deliverability across all accounts.