Fixing Missing SPF Record
Vulnerability assessment details, CWE reference metrics, and complete code-level patches.
Threat Profile
Vulnerability Analysis
Sender Policy Framework (SPF) lists whitelisted IP addresses and servers allowed to send email from your domain.
How it is Detected
Identified by checking TXT DNS records for prefix 'v=spf1'.
Remediation Guidelines
Add a valid SPF TXT record declaring authorized mail servers.
Remediation Script (DNS TXT Record)
# SECURE REMEDIATION: Sample SPF record whitelisting Google Workspace
example.com. IN TXT "v=spf1 include:_spf.google.com -all"Frequently Asked Questions
What is an SPF record?
A DNS TXT record that defines which mail servers are whitelisted to send emails from your domain.
What is the difference between ~all and -all?
The '~all' flag denotes a soft fail (warn), while '-all' instructs the receiver to reject unauthorized emails outright.
Why is my SPF record invalid?
SPF records are limited to 10 DNS lookups. Exceeding this limit invalidates the record.
Related Vulnerability Profiles
SQL Injection (SQLi)
Attackers execute arbitrary SQL commands, bypassing authentication and manipulating database schemas.
Stored Cross-Site Scripting (Stored XSS)
Malicious scripts are stored on the server (e.g. database) and executed when users request the compromised resource.
Reflected Cross-Site Scripting (Reflected XSS)
Malicious scripts are reflected off the web server (e.g. search queries) and executed immediately in the user's browser.
DOM-based Cross-Site Scripting (DOM XSS)
Vulnerability where the client-side JavaScript processes inputs in an unsafe way (e.g. using eval or innerHTML).