Email authentication, SPF management, and deliverability insightshttps://autospf.com/en-ushttps://autospf.com/blog/nis2-vs-dora-vs-gdpr-practical-guide-for-eu-businesses/https://autospf.com/blog/nis2-vs-dora-vs-gdpr-practical-guide-for-eu-businesses/Cybersecurity rules in the EU are getting stricter, and businesses can no longer treat them as optional. Frameworks like NIS2, DORA, and GDPR are nowThu, 02 Apr 2026 12:37:03 GMTDKIMDMARCemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/what-best-practices-create-spf-record-pass-kitterman-validation/https://autospf.com/blog/what-best-practices-create-spf-record-pass-kitterman-validation/To create an SPF record that consistently passes Kitterman SPF validation, you must adhere strictly to RFC 7208 syntax (one TXT record starting withWed, 01 Apr 2026 12:00:38 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/automating-spf-record-management-a-smarter-approach-for-mssps/https://autospf.com/blog/automating-spf-record-management-a-smarter-approach-for-mssps/MSSPs often manage dozens or even hundreds of client domains, each with its own SPF configuration. Handling this manually can quickly become overwhelming.Tue, 31 Mar 2026 12:35:26 GMTSPFSPF Flattening toolSPF recordbrad-slavinhttps://autospf.com/blog/how-create-valid-spf-record-for-multiple-third-party-senders/https://autospf.com/blog/how-create-valid-spf-record-for-multiple-third-party-senders/To create a valid SPF record that passes Google’s validation for multiple third‑party senders, publish a single TXT record starting with v=spf1 thatTue, 31 Mar 2026 12:08:15 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/think-your-spf-is-fine-validator-might-prove-you-wrong/https://autospf.com/blog/think-your-spf-is-fine-validator-might-prove-you-wrong/Yes—an SPF validator frequently uncovers hidden errors (lookup-limit breaches, missing or mistyped includes, misordered mechanisms, permissive all, andMon, 30 Mar 2026 13:05:46 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/guide-to-preventing-your-emails-from-going-to-spam-folders/https://autospf.com/blog/guide-to-preventing-your-emails-from-going-to-spam-folders/Getting emails into the inbox is not just about writing a good message; it’s about proving, again and again, that your emails deserve to be there. ManyFri, 27 Mar 2026 11:34:22 GMTDKIMSPFSPF recordbrad-slavinhttps://autospf.com/blog/why-spf-record-syntax-uses-include-and-all-mechanisms/https://autospf.com/blog/why-spf-record-syntax-uses-include-and-all-mechanisms/SPF syntax includes mechanisms like include and all so domain owners can modularly authorize many disparate sending sources (include) while enforcing aWed, 25 Mar 2026 12:02:37 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/spf-permerror-vs-spf-temperror-whats-the-difference/https://autospf.com/blog/spf-permerror-vs-spf-temperror-whats-the-difference/When your outgoing email does not return a normal pass or fail SPF, you might think that the message was simply not authenticated. But it can be a littleTue, 24 Mar 2026 10:46:24 GMTDKIMDMARCemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/most-common-spf-checker-finding-misconfigured-include-statements-explained/https://autospf.com/blog/most-common-spf-checker-finding-misconfigured-include-statements-explained/The most common SPF checker finding that indicates misconfigured include statements is that the included domain publishes no SPF record (e.g.,Mon, 23 Mar 2026 14:32:02 GMTSPFSPF recordbrad-slavinhttps://autospf.com/blog/reduce-dns-lookups-spf-avoid-exceeding-lookup-limits-guide-best/https://autospf.com/blog/reduce-dns-lookups-spf-avoid-exceeding-lookup-limits-guide-best/You reduce DNS lookups in SPF by replacing lookup-heavy mechanisms (include, a, mx, ptr, exists) with explicit ip4/ip6 entries, consolidating orFri, 20 Mar 2026 10:36:17 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/understanding-gmails-hipaa-compliance-what-businesses-must-know/https://autospf.com/blog/understanding-gmails-hipaa-compliance-what-businesses-must-know/HIPAA compliance means protecting sensitive patient data, also called protected health information or PHI. This includes names, medical records, insuranceFri, 20 Mar 2026 08:55:08 GMTDKIMDMARCemail securitySPFbrad-slavinhttps://autospf.com/blog/what-limitations-exist-when-relying-on-an-spf-record-tester/https://autospf.com/blog/what-limitations-exist-when-relying-on-an-spf-record-tester/SPF record testers are valuable diagnostics but they can mislead you because they may not fully enforce the 10-DNS-lookup limit (especially with nestedThu, 19 Mar 2026 10:58:47 GMTDKIMDMARCSPFSPF errorSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/what-is-rfc-7208-spf-standard-email-authentication-explained/https://autospf.com/blog/what-is-rfc-7208-spf-standard-email-authentication-explained/RFC stands for Request for Comments, a series of documents used by the Internet community to publish technical guidelines, protocols, and standards that keWed, 18 Mar 2026 18:07:44 GMTDKIMDMARCemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/the-hidden-rules-of-spf-record-syntax-youre-probably-missing/https://autospf.com/blog/the-hidden-rules-of-spf-record-syntax-youre-probably-missing/The hidden SPF syntax rules most teams miss are that SPF evaluates mechanisms left-to-right and stops at the first match; only one SPF TXT record is alloweWed, 18 Mar 2026 17:59:21 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/from-dns-to-deliverability-why-an-spf-record-tester-matters/https://autospf.com/blog/from-dns-to-deliverability-why-an-spf-record-tester-matters/An SPF record tester matters because it verifies your DNS-published sender authorizations end-to-end, catches syntax and lookup-limit failures before mailbMon, 16 Mar 2026 16:57:19 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/how-to-interpret-spf-checker-results-with-multiple-include-mechanisms/https://autospf.com/blog/how-to-interpret-spf-checker-results-with-multiple-include-mechanisms/If an SPF checker shows multiple include mechanisms, interpret each as a delegated check of another domain’s SPF that is evaluated left-to-right for the saFri, 13 Mar 2026 18:26:59 GMTDKIMDMARCSPFSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/cname-vs-alias-records-what-you-should-know-about-them/https://autospf.com/blog/cname-vs-alias-records-what-you-should-know-about-them/Email ecosystems these days are no longer limited to only a couple of email servers. Most organizations now rely on external tools and services, such as emThu, 12 Mar 2026 19:36:45 GMTDKIMDMARCemail securitySPFbrad-slavinhttps://autospf.com/blog/what-causes-spf-validator-lookup-limit-or-mechanism-count-issues/https://autospf.com/blog/what-causes-spf-validator-lookup-limit-or-mechanism-count-issues/An SPF validator reports lookup-limit or mechanism-count issues when evaluating a sender’s SPF policy would require more than 10 DNS-querying terms—specifiThu, 12 Mar 2026 15:56:54 GMTDKIMDMARCSPFSPF FlatteningSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/from-zero-to-secure-creating-spf-record-for-your-domain/https://autospf.com/blog/from-zero-to-secure-creating-spf-record-for-your-domain/To create an SPF record from scratch and secure your domain, publish a DNS TXT record at your sending domain (or subdomain) in the form v=spf1 [authorized Wed, 11 Mar 2026 17:02:24 GMTDKIMDMARCSPFSPF FlatteningSPF recordbrad-slavinhttps://autospf.com/blog/spf-flattening-growing-domains-preventing-spf-failures-lookup-errors/https://autospf.com/blog/spf-flattening-growing-domains-preventing-spf-failures-lookup-errors/To prevent SPF failures and DNS lookup errors as your domain grows, you should implement automated SPF flattening that replaces include/redirect mechanismsTue, 10 Mar 2026 17:54:28 GMTDKIMDMARCSPFSPF errorSPF FlatteningSPF Permerrorbrad-slavinhttps://autospf.com/blog/what-best-practices-spf-record-example-avoid-dns-lookup-limits/https://autospf.com/blog/what-best-practices-spf-record-example-avoid-dns-lookup-limits/The best practices to avoid SPF DNS lookup limits are to use only necessary lookup‑triggering mechanisms, prefer ip4/ip6 literals and CIDR ranges, apply TTMon, 09 Mar 2026 17:08:00 GMTDKIMSPFSPF FlatteningSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/ncsc-retiring-web-check-mail-check-what-means-security-teams/https://autospf.com/blog/ncsc-retiring-web-check-mail-check-what-means-security-teams/Back in 2017, when the web wasn’t as structured as it is today from a security standpoint, many organizations didn’t have the right tools to analyze the seFri, 06 Mar 2026 17:35:26 GMTDKIMDMARCSPFbrad-slavinhttps://autospf.com/blog/how-to-interpret-spf-lookup-results-to-find-configuration-errors/https://autospf.com/blog/how-to-interpret-spf-lookup-results-to-find-configuration-errors/You can interpret SPF lookup results to find configuration errors by parsing the record’s mechanisms and qualifiers in order, comparing them to the connectFri, 06 Mar 2026 17:18:31 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/avoid-email-spoofing-with-sender-policy-framework-office-365-configuration/https://autospf.com/blog/avoid-email-spoofing-with-sender-policy-framework-office-365-configuration/To avoid email spoofing with Sender Policy Framework (SPF) in Office 365, publish a correct SPF TXT record (typically v=spf1 include:spf.protection.outlookThu, 05 Mar 2026 18:33:45 GMTDKIMDMARCSPFbrad-slavinhttps://autospf.com/blog/how-to-set-up-spf-for-avanan-email-security-properly/https://autospf.com/blog/how-to-set-up-spf-for-avanan-email-security-properly/It’s 2026, and companies no longer use traditional on-premise email servers; they have now moved to cloud platforms like Microsoft 365 and Google WorkspaceThu, 05 Mar 2026 17:41:38 GMTDMARCemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/advanced-spf-record-testing-protect-your-domain-from-permerror-issues/https://autospf.com/blog/advanced-spf-record-testing-protect-your-domain-from-permerror-issues/To protect your domain from SPF permerror issues, enforce strict syntax validation, cap DNS lookups to 10 with include minimization and judicious flatteninTue, 03 Mar 2026 18:11:44 GMTDKIMDMARCSPFSPF FlatteningSPF recordbrad-slavinhttps://autospf.com/blog/spf-lookup-in-2026-best-practices-for-secure-email-authentication/https://autospf.com/blog/spf-lookup-in-2026-best-practices-for-secure-email-authentication/In 2026, the best practices for secure SPF lookups are to keep SPF within the 10-DNS-lookup limit by optimizing and (selectively) flattening includes, prefMon, 02 Mar 2026 17:59:26 GMTDKIMSPFSPF FlatteningSPF recordbrad-slavinhttps://autospf.com/blog/how-should-you-implement-dmarc-as-an-msp-or-an-enterprise/https://autospf.com/blog/how-should-you-implement-dmarc-as-an-msp-or-an-enterprise/Most guides treat DMARC deployment as a two-step process: publishing the DNS record and monitoring its performance. But this is only the starting point andFri, 27 Feb 2026 18:41:39 GMTDKIMDMARCemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/why-multiple-spf-records-lead-to-authentication-failures/https://autospf.com/blog/why-multiple-spf-records-lead-to-authentication-failures/Multiple SPF records lead to authentication failures because RFC 7208 requires exactly one “v=spf1” policy per domain, so publishing more than one causes aFri, 27 Feb 2026 17:53:57 GMTDKIMDMARCSPFSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/when-spf-permerror-disrupts-delivery-hidden-causes-youre-missing/https://autospf.com/blog/when-spf-permerror-disrupts-delivery-hidden-causes-youre-missing/SPF permerror disrupts delivery when your SPF record has syntax faults (missing v=spf1, invalid qualifiers, malformed ip4/ip6 or macros), exceeds the 10-DNThu, 26 Feb 2026 18:05:06 GMTDKIMSPFSPF errorSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/why-email-delivery-failures-happen-and-how-to-fix-2026/https://autospf.com/blog/why-email-delivery-failures-happen-and-how-to-fix-2026/Email delivery failure in 2026 is no longer just about an email “bouncing.” It now includes any situation where your message does not reach the recipient’sWed, 25 Feb 2026 18:31:01 GMTDKIMDMARCSPFbrad-slavinhttps://autospf.com/blog/why-spf-records-use-all-or-all-and-their-implications/https://autospf.com/blog/why-spf-records-use-all-or-all-and-their-implications/An SPF record shows “~all” (softfail) when a domain wants receivers to treat non-authorized senders as suspicious but typically still accept and score themWed, 25 Feb 2026 18:27:52 GMTDKIMSPFSPF recordbrad-slavinhttps://autospf.com/blog/what-best-practices-spf-record-generator-enforce-for-reliability/https://autospf.com/blog/what-best-practices-spf-record-generator-enforce-for-reliability/An SPF record generator should enforce RFC 7208–compliant syntax and semantics; cap and flatten DNS lookups to stay under the 10-lookup limit; manage recorTue, 24 Feb 2026 17:56:20 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/spf-lookup-best-practices-to-configure-and-maintain-spf-records/https://autospf.com/blog/spf-lookup-best-practices-to-configure-and-maintain-spf-records/To configure and maintain accurate SPF records, build a minimal, syntactically correct policy per sending identity, prefer the right mechanism (include vs Mon, 23 Feb 2026 19:01:24 GMTDKIMDMARCSPFSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/550-from-address-violates-usernamecasemapped-policy-common-causes-and-fixes/https://autospf.com/blog/550-from-address-violates-usernamecasemapped-policy-common-causes-and-fixes/For an email to reach the recipient, it must meet the specific requirements set by the receiving server, which govern address syntax, authentication, and pFri, 20 Feb 2026 18:32:14 GMTDKIMDMARCemail securitySPFbrad-slavinhttps://autospf.com/blog/avoid-email-authentication-failures-in-office-365-with-spf/https://autospf.com/blog/avoid-email-authentication-failures-in-office-365-with-spf/To avoid email authentication failures in Office 365 with SPF, publish a single authoritative SPF TXT record for each sending domain (typically v=spf1 inclFri, 20 Feb 2026 17:05:17 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/advanced-spf-flattening-implementation-for-reliable-email-authentication/https://autospf.com/blog/advanced-spf-flattening-implementation-for-reliable-email-authentication/To implement advanced SPF flattening for reliable email authentication, you need a resolver that recursively expands and deduplicates mechanisms while enfoThu, 19 Feb 2026 18:27:06 GMTDKIMDMARCSPFSPF FlatteningSPF recordbrad-slavinhttps://autospf.com/blog/avoiding-the-common-spf-and-dkim-mistakes-in-2026/https://autospf.com/blog/avoiding-the-common-spf-and-dkim-mistakes-in-2026/Email authentication is no longer a “set it once and forget it” task. In 2026, mailbox providers are applying stricter filtering rules, and even small SPF Thu, 19 Feb 2026 16:06:06 GMTDKIMDMARCemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/what-best-practices-spf-checker-should-recommend-maintaining-spf-records/https://autospf.com/blog/what-best-practices-spf-checker-should-recommend-maintaining-spf-records/The best practices an SPF checker should recommend are to keep records within the 10-lookup and size limits, modularize with precise ip4/ip6 and scoped incWed, 18 Feb 2026 20:34:35 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/how-spf-record-differs-from-dkim-dmarc-email-authentication/https://autospf.com/blog/how-spf-record-differs-from-dkim-dmarc-email-authentication/An SPF record example differs from DKIM and DMARC examples because SPF is a domain-level TXT that lists authorized sending hosts evaluated at SMTP envelopeTue, 17 Feb 2026 18:47:37 GMTDKIMDKIM recordDMARCSPFSPF Permerrorbrad-slavinhttps://autospf.com/blog/spf-checker-online-ensure-email-authentication-standards-compliance/https://autospf.com/blog/spf-checker-online-ensure-email-authentication-standards-compliance/Google’s SPF checker most often reports “no SPF record” when the domain publishes only the deprecated SPF resource record (not a TXT), when DNS propagationMon, 16 Feb 2026 20:31:11 GMTDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/how-incorrect-spf-record-affects-mimecast-spoofing-protection/https://autospf.com/blog/how-incorrect-spf-record-affects-mimecast-spoofing-protection/An incorrect SPF record reduces Mimecast’s spoofing protection by causing SPF evaluation errors (fail, softfail, neutral, temperror, permerror), breaking DFri, 13 Feb 2026 20:54:56 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/what-causes-dkim-spf-failures-and-how-to-recognize/https://autospf.com/blog/what-causes-dkim-spf-failures-and-how-to-recognize/DKIM and SPF typically fail due to DNS record mistakes, signature-breaking message modifications, identity alignment mismatches, SPF’s 10-lookup limit, keyThu, 12 Feb 2026 19:14:53 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/how-to-avoid-spam-and-phishing-emails-in-your-inbox/https://autospf.com/blog/how-to-avoid-spam-and-phishing-emails-in-your-inbox/Spam and phishing emails are no longer just a minor inconvenience sitting quietly in your junk folder. They are often the first step in phishing attacks, fThu, 12 Feb 2026 14:35:53 GMTDKIMDMARCemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/what-common-spf-configuration-mistakes-cause-google-to-flag-emails/https://autospf.com/blog/what-common-spf-configuration-mistakes-cause-google-to-flag-emails/Google most commonly flags emails when SPF is misconfigured—specifically multiple or duplicate SPF TXT records, exceeding the 10 DNS-lookup limit, misusingWed, 11 Feb 2026 17:55:49 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/how-to-change-spf-all-policy-in-dns-without-mail-failures/https://autospf.com/blog/how-to-change-spf-all-policy-in-dns-without-mail-failures/To update your DNS and change the SPF “all” policy without causing mail failures, first inventory and authorize every legitimate sender, reduce DNS TTLs, sTue, 10 Feb 2026 18:39:26 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/how-to-diagnose-and-fix-dkim-and-spf-email-authentication-failures/https://autospf.com/blog/how-to-diagnose-and-fix-dkim-and-spf-email-authentication-failures/To troubleshoot DKIM and SPF failures reported by mailbox providers, parse bounce and Authentication-Results data to separate SPF from DKIM issues, validatMon, 09 Feb 2026 18:09:37 GMTDKIMDMARCSPFSPF recordbrad-slavinhttps://autospf.com/blog/how-do-spf-flattening-tools-affect-dmarc-and-dkim-enforcement/https://autospf.com/blog/how-do-spf-flattening-tools-affect-dmarc-and-dkim-enforcement/SPF flattening tools improve DMARC SPF alignment reliability by reducing DNS lookup failures and timeouts but do not directly affect DKIM; when well-maintaFri, 06 Feb 2026 22:46:30 GMTDKIMDMARCSPFSPF FlatteningSPF Flattening toolSPF PermerrorSPF recordbrad-slavinhttps://autospf.com/blog/how-to-replace-multiple-spf-txt-records-with-one-valid-record/https://autospf.com/blog/how-to-replace-multiple-spf-txt-records-with-one-valid-record/Publish a single DNS TXT record at the domain that begins with v=spf1 and combines all mechanisms (for example: “v=spf1 ip4:203.0.113.0/24 ip6:2001:db8::/3Thu, 05 Feb 2026 15:04:53 GMTDKIMemail securitySPFSPF recordbrad-slavinhttps://autospf.com/blog/how-can-i-combine-an-spf-generator-with-dkim-and-dmarc-for-better-deliverability/https://autospf.com/blog/how-can-i-combine-an-spf-generator-with-dkim-and-dmarc-for-better-deliverability/Combine an SPF generator with DKIM and DMARC for better deliverability by using AutoSPF to produce a single, flattened SPF include that authorizes every seWed, 04 Feb 2026 21:43:42 GMTemail securitySPFSPF recordbrad-slavin