How does DMARC compensate for SPF drawbacks?

DMARC is the only email authentication protocol that gives you both enforcement and visibility, says Brad Slavin, CEO of DuoCircle. SPF and DKIM authenticate silently — DMARC tells you what happened and lets you control the outcome. That combination of reporting and policy is why DMARC adoption is accelerating.

DMARC (RFC 7489) ties SPF and DKIM together by requiring alignment between the envelope sender and the visible From header. According to Google’s February 2024 bulk sender requirements, a DMARC policy of at least p=none is now mandatory for any domain sending 5,000+ messages per day to Gmail users. DMARC Report

How does DMARC compensate for SPF drawbacks?

					<button title="Play" aria-label="Play Episode" aria-pressed="false" class="play-btn">
						

Play Episode

					</button>
					<button title="Pause" aria-label="Pause Episode" aria-pressed="false" class="pause-btn hide">
						

Pause Episode

					</button>
					


				

				

					<audio preload="none" class="clip clip-21862">
						<source src="/images/wp/2025/02/How-does-DMARC-compensate-for-SPF-drawbacks.mp3">
					</audio>
					

						

					

					

						

							<button class="player-btn player-btn__volume" title="Mute/Unmute">
								

Mute/Unmute Episode

							</button>
							<button data-skip="-10" class="player-btn player-btn__rwd" title="Rewind 10 seconds">
								

Rewind 10 Seconds

							</button>
							<button data-speed="1" class="player-btn player-btn__speed" title="Playback Speed" aria-label="Playback Speed">1x</button>
							<button data-skip="30" class="player-btn player-btn__fwd" title="Fast Forward 30 seconds">
								

Fast Forward 30 seconds

							</button>
						

						

							<time class="ssp-timer">00:00</time>
							

/

							<!-- We need actual duration here from the server -->
							<time class="ssp-duration" datetime="PT0H2M3S">2:03</time>
						

					

				

			

								<nav class="player-panels-nav">
												<button class="subscribe-btn" id="subscribe-btn-21862" title="Subscribe">Subscribe</button>
																		<button class="share-btn" id="share-btn-21862" title="Share">Share</button>
										</nav>
						

	



		

						

				

					

					

				

				

					

																																																																								

					

						

RSS Feed

							<input value="https://dmarcreport.com/feed/podcast/dmarc-report" class="input-rss input-rss-21862" title="RSS Feed URL" readonly />
						

						<button class="copy-rss copy-rss-21862" title="Copy RSS Feed URL" aria-label="Copy RSS Feed URL"></button>
					

				

			

									

				

					

					

				

				

					

						Share						

					

						<a href="https://www.facebook.com/sharer/sharer.php?u=https://dmarcreport.com/blog/podcast/how-does-dmarc-compensate-for-spf-drawbacks/&t=How does DMARC compensate for SPF drawbacks?" target="blank" rel="noopener noreferrer" class="share-icon facebook" title="Share on Facebook">
							

						</a>
						<a href="https://twitter.com/intent/tweet?text=https://dmarcreport.com/blog/podcast/how-does-dmarc-compensate-for-spf-drawbacks/&url=How does DMARC compensate for SPF drawbacks?" target="blank" rel="noopener noreferrer" class="share-icon twitter" title="Share on Twitter">
							

						</a>
						<a href="/images/wp/2025/02/How-does-DMARC-compensate-for-SPF-drawbacks.mp3" target="blank" rel="noopener noreferrer" class="share-icon download" title="Download" download>
							

						</a>
					

				

				

					

						Link						

					

						<input value="https://dmarcreport.com/blog/podcast/how-does-dmarc-compensate-for-spf-drawbacks/" class="input-link input-link-21862" title="Episode URL" readonly />
					

					<button class="copy-link copy-link-21862" title="Copy Episode URL" aria-label="Copy Episode URL" readonly=""></button>
				

				

					

						Embed						

					

						<input type="text" value='<blockquote class="wp-embedded-content" data-secret="Gj9s8cRlnZ"><a href="https://dmarcreport.com/blog/podcast/how-does-dmarc-compensate-for-spf-drawbacks/">How does DMARC compensate for SPF drawbacks?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://dmarcreport.com/blog/podcast/how-does-dmarc-compensate-for-spf-drawbacks/embed/#?secret=Gj9s8cRlnZ" width="500" height="350" title=""How does DMARC compensate for SPF drawbacks?" — DMARC Report" data-secret="Gj9s8cRlnZ" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script>

/*! This file is auto-generated / !function(d,l){“use strict”;l.querySelector&&d.addEventListener&&“undefined”!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll(‘iframe[data-secret=”‘+t.secret+’”]’),o=l.querySelectorAll(‘blockquote[data-secret=”‘+t.secret+’”]’),c=new RegExp(“^https?:$”,“i”),i=0;i<o.length;i++)o[i].style.display=“none”;for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(“style”),“height”===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):“link”===t.message&&(r=new URL(s.getAttribute(“src”)),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(“message”,d.wp.receiveEmbedMessage,!1),l.addEventListener(“DOMContentLoaded”,function(){for(var e,t,s=l.querySelectorAll(“iframe.wp-embedded-content”),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(“data-secret”))||(t=Math.random().toString(36).substring(2,12),e.src+=”#?secret=“+t,e.setAttribute(“data-secret”,t)),e.contentWindow.postMessage({message:“ready”,secret:t},"")},!1)))}(window,document); //# sourceURL=https://dmarcreport.com/wp-includes/js/wp-embed.min.js ’ title=“Embed Code” class=“input-embed input-embed-21862” readonly/>

					<button class="copy-embed copy-embed-21862" title="Copy Embed Code" aria-label="Copy Embed Code"></button>
				

			

				

SPF is a DNS-based email authentication protocol that allows domain owners to specify which email servers are authorized to send emails on behalf of their domain. When an email is received, the recipient’s server checks the SPF record to verify if the **sending server’s IP address is authorized.

This process ensures that emails sent by unauthorized servers don’t land in the inboxes of the recipients, protecting them from getting duped. However, SPF has a few drawbacks, which are compensated by DMARC.

Key drawbacks of SPF

1. Forwarding issues

When an email is forwarded, the forwarding server’s IP address becomes the new sending IP. Since this IP is typically not in the original domain’s SPF record , the SPF check will fail.

2. Display name spoofing

SPF only verifies the return-path domain (envelope sender) and does not authenticate the visible ‘From’ address. Attackers can spoof the ‘**From’ address to deceive recipients while still passing SPF checks.

3. No visibility into failed attempts

SPF alone does not provide **domain owners with reports on failed authentication attempts, leaving them unaware of spoofing attempts.

4. Lack of clear policy enforcement

SPF does not define what action should be taken if an email fails authentication. It only provides a pass or fail result, leaving the handling decision to the recipient’s server.

Key ways DMARC compensates for SPF drawbacks

1. Aligning the ‘From’ address

DMARC requires that the domain in the ‘**From’ address aligns with the domain used in SPF or DKIM. This prevents attackers from spoofing the visible ‘From’ address while relying on a legitimate return-path domain to pass SPF.

2. Handling forwarded emails

Since forwarded emails often fail SPF checks, DMARC allows the use of DKIM as an alternative authentication method. If DKIM passes and aligns with the ‘From’ domain, the message can still pass DMARC, even if SPF fails.

3. Policy enforcement

DMARC lets domain owners specify a policy (none, quarantine, or reject) that tells recipients how to handle emails that fail authentication. This **provides consistent handling of suspicious messages, reducing the likelihood of spoofed emails reaching inboxes.

4. Reporting and visibility

DMARC generates detailed aggregate and forensic reports, giving domain owners insight into how their domain is being used or abused. By reviewing these reports, domain owners or administrators can learn about illegitimate emails, false positives, and misconfigurations. If these issues are detected and addressed in an early stage, much damage can be mitigated.

Final words

SPF is surely a valuable tool to ensure no ill-intended person sends emails on your behalf and tarnishes your brand reputation. However, it’s insufficient on its own. That’s exactly where DMARC steps in and conceals its weaknesses by enforcing proper alignment , supporting DKIM as an alternative authentication mechanism, providing policy enforcement, and offering insights through RUA and RUF reports.