Free SPF & DMARC Record Generator
Email spoofing and impersonation attacks remain among the most dangerous cyber threats facing online businesses. Because standard Simple Mail Transfer Protocol (SMTP) lacks built-in sender verification, malicious actors can easily forge your domain name in the From header of outgoing messages. Sender Policy Framework (SPF, RFC 7208) and Domain-based Message Authentication, Reporting, and Conformance (DMARC, RFC 7489) provide the standardized cryptographic defenses that allow receiving mailbox providers to authenticate legitimate email sources.
Pingzo's free SPF and DMARC Generator allows you to build error-free, RFC-compliant DNS TXT records in seconds. Configure allowed mail exchanges (MX), designated static server IP ranges (IPv4/IPv6), and third-party SaaS email providers (such as Google Workspace, Microsoft 365, SendGrid, and Amazon SES) with one click. Select appropriate enforcement policies, from observation mode (~all / p=none) to strict quarantine and rejection (-all / p=reject), ensuring your messages bypass spam filters while protecting your brand from phishing abuse.
While generating a compliant record is the essential first step, DNS records are dynamic and easily break over time. Adding too many third-party services can cause your SPF record to silently breach the strict RFC 10-DNS-lookup limit, causing major providers like Gmail and Yahoo to reject legitimate messages. Pingzo offers automated 24/7 Email Health monitoring that audits your SPF, DKIM, and DMARC records daily, sending instant WhatsApp, Telegram, or Slack alerts the moment an SPF lookup overflow or syntax error occurs.
Configure SPF Parameters
Automate 24/7 Email Health & DMARC Audits
A single typo in your SPF or DMARC record can cause Google and Yahoo to reject all your business emails. Pingzo monitors your domain authentication records daily and alerts you instantly if issues arise.
Email Authentication Architecture
How SPF, DKIM, and DMARC work together to establish cryptographic trust and guarantee inbox delivery.
The RFC 10-Lookup Limit
RFC 7208 strictly limits SPF DNS lookups to 10. Combining multiple SaaS email providers can silently exceed this threshold, triggering PermError rejections across Google and Yahoo.
DMARC Policy Progression
Always start with p=none to receive aggregate reports and identify valid senders. Once verified, graduate to p=quarantine and eventually p=reject to completely eliminate spoofing.
Alignment & Subdomain Rules
DMARC alignment requires the domain in the From header to match the domain validated by SPF and DKIM. Use the sp= tag to protect unmonitored subdomains against malicious hijacking.
Related Developer Tools
SPF Record Checker
Validate SPF syntax, evaluate 10-lookup limits, and detect PermErrors.
DMARC Policy Checker
Audit DMARC enforcement tiers (reject/quarantine) and rua mailboxes.
DKIM Record Validator
Inspect DKIM selector keys, verify RSA bit lengths, and detect drops.
DNS Records Lookup
Query A, AAAA, MX, CNAME, TXT, and NS records directly from root servers.
Frequently Asked Questions
Everything you need to know about SPF syntax, DMARC alignment, and automated deliverability monitoring.
Q.What is an SPF record and how does it prevent email spoofing?
Sender Policy Framework (SPF, RFC 7208) is a DNS TXT record that publishes an authorized whitelist of IP addresses and mail servers permitted to send email from your domain. When receiving mail servers (such as Gmail or Outlook) receive an inbound message, they check the connecting server IP against your SPF record. If the IP is unauthorized, the message fails authentication.
Q.What is the difference between SoftFail (~all) and HardFail (-all)?
The all mechanism defines the default policy for senders not explicitly listed. SoftFail (~all) instructs receivers to accept the email but flag it as suspicious (often routing it to Spam). HardFail (-all) strictly instructs receiving mail servers to reject unauthorized emails outright. It is best practice to begin with ~all and graduate to -all once all legitimate sending services are audited.
Q.What is the SPF 10-DNS-lookup limit and how do I avoid exceeding it?
RFC 7208 strictly limits SPF evaluations to a maximum of 10 DNS lookups per authorization check (triggered by include, a, mx, ptr, and exists mechanisms). Exceeding 10 lookups causes receiving mail servers to return a PermError, failing authentication. Avoid nesting multiple unused third-party include: directives, or use IP ranges (ip4:) to minimize queries.
Q.How does DMARC build upon SPF and DKIM?
DMARC (Domain-based Message Authentication, Reporting, and Conformance) links the results of SPF and DKIM to the visible From header. It empowers domain owners to publish explicit enforcement policies (p=none, p=quarantine, or p=reject) and receive XML aggregate forensic reports (rua=) showing who is sending email on their domain's behalf.
Q.How does Pingzo continuously monitor SPF and DMARC health?
Pingzo’s Email Health monitor audits your domain’s SPF, DKIM, and DMARC records every 24 hours. If an SPF record lookup exceeds the 10-query limit, an unauthorized include is detected, or a syntax error is published, Pingzo dispatches instant alerts via WhatsApp, Telegram, Slack, or Discord.
Automate 24/7 Email Health & Record Monitoring
Ensure your SPF, DKIM, and DMARC records never break in silence. Pingzo monitors your domain DNS daily and sends instant WhatsApp, Telegram, or Slack alerts if records rotate unexpectedly or fail validation.