Tagged “spf”
77 articles, page 1 of 2
Navigating Email Authentication for Senders with Multi-Regional MX Records
Organisations with global presence face email authentication challenges, multi-regional MX records add complexity, learn to optimise
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DMARC and Subdomain Delegation for Franchise Networks with Centralised Email Infrastructure
Franchise networks face DMARC challenges with centralised email. Learn how to simplify subdomain delegation and SPF management
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Mitigating Email Deliverability Issues Due to DNS Zone Transfer Delays
DNS zone transfer delays can cause email authentication failures, deliverability issues due to inconsistent records, and increase risk of DNS amplification attacks
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DMARC and SPF Record Interactions with Greylisting
Greylisting can lead to false positives with DMARC and SPF, causing deliverability issues. Proper configuration is key to avoiding these problems
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DMARC, SPF, and DKIM for Domains with Automated Subdomain Provisioning
Automated subdomain provisioning introduces complexity to email authentication, DMARC Engine shares practical solutions for SPF and DKIM configuration
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Optimising DMARC for Senders with Dynamic IP Pools
Senders with dynamic IP pools face DMARC challenges, we provide solutions to optimise SPF records and improve deliverability
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Navigating Email Authentication for Mergers and Acquisitions
Neglecting email authentication during M&A can lead to deliverability issues, expert guidance on managing SPF, DKIM, DMARC records
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Do changing sending IPs break SPF or DMARC?
Changing sending IPs cannot break DMARC alignment. Which setups genuinely break SPF when addresses change, which worries are myths, and how to make authentication IP-proof.
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DMARC, SPF, and DKIM for Multi-Brand Companies
Multi-brand companies can improve email deliverability with DMARC, SPF, DKIM, preventing spam and phishing, and protecting their reputation. Proper implementation is crucial for seamless communication across brands
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ARC: Authenticated Received Chain explained
Forwarding and mailing lists break SPF and DKIM in transit, flipping a passing message to a DMARC failure. ARC, the Authenticated Received Chain, preserves the original authentication verdict across intermediaries with a signed, tamper-evident chain, so trusted forwarders can vouch for legitimate mail and you can reach p=reject without breaking list traffic.
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How to add DMARC, SPF and DKIM records on Azure DNS
An Azure DNS-specific walkthrough of publishing TXT and CNAME records for DMARC, SPF and DKIM, covering record sets, the @ apex, TXT chunking, the CLI add-record trap, Alias records and why delegation must be set at the registrar.
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How to add DMARC, SPF and DKIM records on Cloudflare
A precise, Cloudflare-specific walkthrough of publishing TXT and CNAME records for DMARC, SPF and DKIM in the Cloudflare DNS editor, with the real gotchas: root versus host name, the orange-cloud proxy, automatic TXT chunking, CNAME flattening at the apex, TTL on Auto, and Email Routing conflicts.
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How to add DMARC, SPF and DKIM records on DigitalOcean
A DigitalOcean-specific walkthrough for publishing DMARC, SPF and DKIM as TXT and CNAME records in the DigitalOcean DNS editor, covering the root-vs-host hostname convention, the no-auto-chunking DKIM trap, apex CNAME rules and TTL.
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Automatic SPF flattening: staying under ten lookups without thinking about it
SPF has a hard limit baked into the specification: a receiving server is allowed to perform at most ten DNS lookups while evaluating your record.
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DKIM alignment and forwarding
A valid DKIM signature is not the same as DKIM alignment. This guide explains how alignment is evaluated, why DKIM is the one signal that survives forwarding while SPF cannot, and exactly how relays and mailing lists affect it.
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How to add DMARC, SPF and DKIM records on Gandi
A precise, Gandi-specific walkthrough for publishing DMARC, SPF and DKIM in the Gandi LiveDNS editor, covering the root vs host name convention, TXT quoting and chunking, CNAME trailing dots and TTL.
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How to add DMARC, SPF and DKIM records on GoDaddy
A precise, GoDaddy-specific walkthrough of adding TXT and CNAME records for DMARC, SPF and DKIM in the GoDaddy DNS editor, covering root versus host names, TXT chunking, CNAME rules and TTL.
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How to add DMARC, SPF and DKIM records on Google Cloud DNS
A precise, Google Cloud DNS-specific walkthrough for publishing TXT and CNAME records for DMARC, SPF and DKIM, including the gotchas that silently break authentication: public versus private managed zones, console versus gcloud TXT quoting, trailing dots on CNAME targets, 255-byte chunking and a TTL strategy for a safe staged rollout to p=reject.
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Email authentication explained for beginners
Email was designed in an era when everyone on the network trusted everyone else, so it shipped with no built-in way to prove who actually sent a message.
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SPF PermError: when your SPF silently stops working
SPF breaks quietly. Cross the 10 DNS-lookup limit and your record returns PermError, fails open, and stops protecting your domain. Here is how to count, fix and flatten it safely.
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How to add DMARC, SPF and DKIM records on IONOS
A precise, IONOS-specific walkthrough of adding TXT and CNAME records for DMARC, SPF and DKIM in the IONOS DNS editor, covering the root-versus-host gotcha, TXT chunking, CNAME flattening, TTL and a safe sequence to p=reject.
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DMARC alignment explained, with examples
A message can pass SPF and verify DKIM yet still fail DMARC. The reason is alignment. This guide explains SPF and DKIM alignment, relaxed versus strict mode, and the exact DMARC pass rule, with five worked examples of messages that pass and fail.
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How to add DMARC, SPF and DKIM records on Namecheap
A precise, Namecheap-specific walkthrough for adding DMARC, SPF and DKIM records in the Advanced DNS editor, covering the host-field gotchas, TXT chunking, CNAME targets, TTL and the safe path from p=none to p=reject.
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The five DNS records that protect your email
Email was designed in an era of trust. The original protocol, SMTP, lets any server on the internet claim to send mail as anyone.
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How to add DMARC, SPF and DKIM records on OVH
A precise, OVH-specific walkthrough for adding SPF, DKIM and DMARC records in the OVH DNS zone editor, covering the apex naming rule, TXT chunking for long DKIM keys, CNAME trailing dots and TTL behaviour.
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Why email forwarding breaks SPF and DKIM
Email almost never travels in a straight line from sender to recipient. It gets redirected by university and corporate aliases, fanned out by mailing lists, scrubbed by security gateways, and quietly relayed by.
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Reading your first DMARC aggregate report
A field-by-field walkthrough of a DMARC aggregate (RUA) XML report: metadata, source IPs, disposition, SPF and DKIM results, alignment, and spotting spoofers.
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Protecting parked and no-mail domains
Domains that never send mail are the easiest to secure and the most commonly left wide open. Here is how to lock down parked, legacy and campaign domains with SPF -all, DMARC p=reject and a null MX so they cannot be spoofed, with zero deliverability risk.
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How to add DMARC, SPF and DKIM records on AWS Route 53
A precise, Route 53-specific walkthrough for publishing SPF, DKIM and DMARC: empty Record name versus host names, TXT quoting and 255-character chunking, why DKIM CNAMEs must never become Alias records, and TTL strategy for a safe staged path to p=reject.
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DMARC for Google Workspace
A new Google Workspace domain ships with no DKIM signing, an SPF record you must add yourself, and no DMARC policy at all. This guide walks the exact order to fix that: get SPF right under the 10-lookup limit, switch on DKIM in the Admin console, then ratchet DMARC from monitoring to full reject without breaking a single legitimate message.
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How to add DMARC, SPF and DKIM records on Squarespace
A precise, Squarespace-specific walkthrough of adding TXT and CNAME records for DMARC, SPF and DKIM in the Squarespace DNS editor, including the gotchas that actually break setups: the doubled-domain Host field, TXT chunking, CNAME-at-apex, SPF flattening and TTL.
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DMARC for Microsoft 365
A practical, ordered guide to email authentication on Microsoft 365: build a complete SPF record for Exchange Online, enable DKIM signing with Microsoft's two selector CNAMEs, and walk DMARC safely from p=none through quarantine to p=reject without breaking your mail.
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How to add DMARC, SPF and DKIM records on Wix
A precise, Wix-specific walkthrough of adding TXT and CNAME records for DMARC, SPF and DKIM in the Wix DNS editor, covering the real gotchas: relative host names, long-TXT chunking, CNAME targets without a trailing dot, the one-SPF-record rule and TTL during testing.
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The DMARC record explained, tag by tag
A plain-English reference to every tag in a DMARC record: v, p, sp, rua, ruf, pct, adkim, aspf, fo, rf and ri. What each one does, the exact syntax it expects and the sensible default to reach for.
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How to reach DMARC p=reject without breaking email
The staged playbook to DMARC enforcement with no email outage: inventory senders, fix SPF and DKIM, ramp p=none to p=reject, and lock down subdomains.
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How email spoofing actually works
Email spoofing takes no password and no exploit: SMTP simply trusts whatever the sender types into the From field. This guide traces the mechanism from the raw SMTP conversation, through the crucial split between the envelope-from used for delivery and the header-from a human reads, to the three layered controls (SPF, DKIM and DMARC alignment) that finally make forging your domain fail.
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How to fix SPF PermError
SPF PermError means a receiver tried to evaluate your SPF record and gave up, so SPF stops counting towards DMARC. This guide diagnoses PermError, TempError and the ten-lookup limit, then walks through a step by step repair process.
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Why forwarding breaks email authentication
Forwarding almost always breaks SPF and sometimes breaks DKIM too. Here is what survives a forwarding hop, why DKIM is the mechanism that carries your authentication through, how DMARC's one-aligned-pass rule copes, and where ARC rescues mailing-list mail.
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DMARC vs SPF vs DKIM: how they fit together
SPF, DKIM and DMARC are named together so often that they blur into one thing. They are not. This is a clear comparison of what each record actually proves, why SPF and DKIM are blind to the From line your recipients trust, and how DMARC ties them together with alignment and policy.
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One-click unsubscribe: the List-Unsubscribe requirement
Google, Yahoo and Microsoft now require working one-click unsubscribe on bulk mail. Here is what the List-Unsubscribe and List-Unsubscribe-Post headers are, how RFC 8058 one-click actually works on the wire, how to implement it correctly, and why it sits alongside SPF, DKIM and DMARC on the same deliverability checklist.
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PCI DSS 4.0, cyber-insurance and email authentication
PCI DSS 4.0 Requirement 5.4.1 and cyber-insurance questionnaires now treat anti-phishing as a measurable control. Here is exactly how that intersects with DMARC, SPF and DKIM, what counts as evidence, and how to reach enforcement without breaking your own mail.
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Email authentication for ActiveCampaign: SPF, DKIM and DMARC
An ActiveCampaign-specific guide to email authentication: the exact SPF include, CNAME-based DKIM, the custom return-path that aligns SPF, and a staged path to DMARC p=reject without breaking your campaigns or automations.
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Publishing DMARC, SPF and DKIM on common DNS hosts
Exact steps to publish SPF, DMARC and DKIM on Cloudflare, GoDaddy, Namecheap and AWS Route 53, plus the two gotchas that break most setups: TXT chunking on long DKIM keys and CNAME coexistence at the apex.
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Email authentication for Amazon SES: SPF, DKIM and DMARC
Amazon SES passes SPF and DKIM by default but on amazonses.com, so nothing aligns under DMARC. Here is the exact SES include, Easy DKIM and its CNAME selectors, the custom MAIL FROM that fixes SPF alignment, and the staged path to p=reject.
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Why Gmail, Yahoo and Microsoft now require DMARC
Gmail, Yahoo and Microsoft now require SPF, DKIM and DMARC from bulk senders. Here is what each demands, what "require" really means, and how to comply.
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How sender reputation works
Mailbox providers decide where your mail lands based on sender reputation, a private estimate built from how recipients react to your messages and how cleanly you send. This guide explains domain and IP reputation, the signals that raise and lower them, how to warm up a new sender, and why aligned SPF, DKIM and DMARC are what keep the reputation you build genuinely yours.
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Email authentication for Amazon WorkMail: SPF, DKIM and DMARC
Amazon WorkMail sends through SES, so its defaults quietly fail DMARC alignment. Here is the exact SPF include, the three Easy DKIM CNAMEs, the custom MAIL FROM domain that fixes SPF alignment, and the staged path to p=reject without an outage.
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Email authentication for Brevo: SPF, DKIM and DMARC
A Brevo-specific guide to SPF, DKIM and DMARC: the exact spf.brevo.com include, both DKIM CNAME selectors, why the return-path means DKIM (not SPF) carries DMARC on shared IPs, custom return-path with a dedicated IP, and the staged path from p=none to p=reject without breaking delivery.
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