Read our blog for the latest updates, guides, and expert tips on DMARC, SPF, DKIM, email authentication, domain protection, and cybersecurity explained by professionals.https://dmarkoff.comenhttps://dmarkoff.com/blog/what-is-a-phishing-linkhttps://dmarkoff.com/blog/what-is-a-phishing-linkPhishing remains one of the most common ways cybercriminals attempt to steal your credentials, financial information, and other sensitive data. Although phishing campaigns can take many forms, a phishing link is often the point where a deceptive message turns into an actual security compromise.Thu, 03 Sep 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/why-your-business-should-budget-for-dmarchttps://dmarkoff.com/blog/why-your-business-should-budget-for-dmarcCompanies use email for everything from internal communication and customer support to invoices, password resets, transactional notifications, and marketing campaigns. That dependence also makes email domains attractive targets for impersonation, phishing, and business email compromise.Wed, 02 Sep 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/no-spf-record-foundhttps://dmarkoff.com/blog/no-spf-record-foundSeeing a “No SPF Record Found” message during an SPF check usually means that the domain does not have a valid Sender Policy Framework record published in DNS. While this may look like a minor configuration issue, it can affect both email security and deliverability.Mon, 31 Aug 2026 00:00:00 GMTTanya TarasenkoSPF & DKIMhttps://dmarkoff.com/blog/why-ecommerce-stores-need-dmarchttps://dmarkoff.com/blog/why-ecommerce-stores-need-dmarcEmail is one of the most important communication channels for an ecommerce business. Customers depend on it for order confirmations, shipping notifications, password resets, invoices, abandoned cart reminders, promotional offers, and customer support.Wed, 19 Aug 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/dkim-authentication-failedhttps://dmarkoff.com/blog/dkim-authentication-failedDKIM is one of the core email authentication mechanisms used to verify that a message was legitimately signed by a domain and that the signed parts of the email weren’t altered after signing. When DKIM works correctly, receiving mail servers can retrieve the sender’s public key from DNS and use it to verify the cryptographic signature attached to the email.Tue, 18 Aug 2026 00:00:00 GMTTanya TarasenkoSPF & DKIMhttps://dmarkoff.com/blog/how-to-fix-email-rejected-per-dmarc-policyhttps://dmarkoff.com/blog/how-to-fix-email-rejected-per-dmarc-policyEmail authentication helps organizations protect their domains, recipients, and brand reputation from fraudulent messages. However, configuration problems can sometimes cause legitimate emails to fail authentication and be rejected by receiving mail servers.Fri, 14 Aug 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/top-dmarc-monitoring-tools-for-startupshttps://dmarkoff.com/blog/top-dmarc-monitoring-tools-for-startupsStartups depend heavily on email. At the same time, growing companies often add new email tools quickly. Marketing platforms, CRMs, support systems, transactional email providers, and sales automation tools may all send messages on behalf of the same domain. Without proper authentication and monitoring, this creates opportunities for configuration errors, spoofing, phishing, and legitimate email delivery problems.Wed, 12 Aug 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/dmarc-tags-cheat-sheethttps://dmarkoff.com/blog/dmarc-tags-cheat-sheetDMARC tags are the building blocks of a DMARC record. They tell receiving email servers how to process messages that fail authentication, where to send reports, and how strictly SPF and DKIM domains must align with the visible sender domain.Mon, 10 Aug 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/spf-softfail-vs-spf-hardfailhttps://dmarkoff.com/blog/spf-softfail-vs-spf-hardfailThe final mechanism in an SPF record often determines what should happen when the sender does not match any authorised source. Two of the most common options are SPF softfail, represented by ~all, and SPF hardfail, represented by -all.Mon, 03 Aug 2026 00:00:00 GMTTanya TarasenkoSPF & DKIMhttps://dmarkoff.com/blog/what-is-a-dmarc-policyhttps://dmarkoff.com/blog/what-is-a-dmarc-policyEmail domain spoofing allows attackers to send fraudulent messages that appear to come from a legitimate company. These emails may be used to steal credentials, distribute malicious content, impersonate executives, or deceive customers into transferring money.Fri, 31 Jul 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/what-is-a-dkim-signaturehttps://dmarkoff.com/blog/what-is-a-dkim-signatureA DKIM signature is one of the most important parts of email authentication. It helps receiving mail servers check if an email was really authorized by the domain that sent it and if the message was changed after being sent.Wed, 29 Jul 2026 00:00:00 GMTTanya TarasenkoSPF & DKIMhttps://dmarkoff.com/blog/email-security-for-fintechhttps://dmarkoff.com/blog/email-security-for-fintechFinancial services companies depend on email for some of their most sensitive interactions. Banks send account alerts, payment confirmations, statements, security notifications, and password-reset messages. Fintech platforms use email for customer onboarding, identity verification, loan updates, investment notifications, and support conversations.Thu, 23 Jul 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/dmarc-for-cold-emailhttps://dmarkoff.com/blog/dmarc-for-cold-emailYou can have the perfect outbound email strategy, but if mailbox providers don't trust your domain, prospects never see your offer.Tue, 21 Jul 2026 00:00:00 GMTKhrystyna SliusarDMARChttps://dmarkoff.com/blog/parked-domainshttps://dmarkoff.com/blog/parked-domainsA parked domain is a registered domain name that is not currently being used for a full website, active application, or regular email communication. Instead of showing a complete website, it may display a placeholder page, a “coming soon” message, a for-sale notice, ads, or it may redirect visitors to another domain.Wed, 15 Jul 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/spf-vs-dkim-vs-dmarchttps://dmarkoff.com/blog/spf-vs-dkim-vs-dmarcSPF, DKIM, and DMARC are the three core protocols that help receiving mail servers verify whether an email is legitimate. Each one solves a different part of the problem. SPF checks whether a server is allowed to send mail for a domain. DKIM verifies that a message was signed by an authorized domain and was not changed after signing. DMARC connects SPF and DKIM to the visible From domain and tells receivers what to do when authentication fails.Fri, 03 Jul 2026 00:00:00 GMTYulia GulevichDMARChttps://dmarkoff.com/blog/how-to-set-up-dmarc-for-a-domainhttps://dmarkoff.com/blog/how-to-set-up-dmarc-for-a-domainSetting up DMARC is one of the most important steps for protecting your domain from spoofing, phishing attempts, and unauthorized email use. However, publishing a DMARC record is only the beginning. A proper DMARC setup requires three steps: creating the record, adding it to your DNS, and monitoring the reports to understand who is sending email from your domain.Thu, 02 Jul 2026 00:00:00 GMTYulia GulevichDMARChttps://dmarkoff.com/blog/why-your-saas-emails-land-in-spamhttps://dmarkoff.com/blog/why-your-saas-emails-land-in-spamYou built the product. The signup form works, the database is humming, and payments are wired up through Stripe. Then you launch and conversion is mysteriously low. People sign up, but never confirm. Trial users say they never got the welcome email. A customer insists they paid, but your records show the invoice as unpaid.Thu, 25 Jun 2026 00:00:00 GMTYulia GulevichSPF & DKIMhttps://dmarkoff.com/blog/dmarc-failurehttps://dmarkoff.com/blog/dmarc-failureIt is concerning when your messages fail DMARC authentication, especially when your organization extensively relies on email for both internal and external communications. However, there are techniques and tools that can help you diagnose and prevent DMARC failures.Wed, 24 Jun 2026 00:00:00 GMTYulia GulevichDMARChttps://dmarkoff.com/blog/what-is-the-dmarc-sp-taghttps://dmarkoff.com/blog/what-is-the-dmarc-sp-tagEmail spoofing doesn't only target your primary domain. Attackers frequently abuse subdomains to impersonate, launch phishing campaigns, and damage brand reputation. While many businesses focus on protecting their root domain with DMARC, they often overlook the security of subdomains.Wed, 17 Jun 2026 00:00:00 GMTYulia GulevichDMARChttps://dmarkoff.com/blog/dmarc-reportshttps://dmarkoff.com/blog/dmarc-reportsDMARC has become one of the most important email authentication standards for organizations looking to protect their domains from phishing, spoofing, and unauthorized email use. While publishing a DMARC record is an important first step, the real value of DMARC comes from the visibility it provides into your email ecosystem.Fri, 12 Jun 2026 00:00:00 GMTTanya TarasenkoDMARChttps://dmarkoff.com/blog/dmarc-updates-rcf-9989https://dmarkoff.com/blog/dmarc-updates-rcf-9989DMARC continues to progress as email providers and standards organizations work to make email authentication more reliable, secure, and easier to implement.Mon, 08 Jun 2026 00:00:00 GMTJulia GulevichDMARChttps://dmarkoff.com/blog/queued-emails-explainedhttps://dmarkoff.com/blog/queued-emails-explainedYou write an email, click send, and expect it to disappear into the internet within seconds. Instead, it sits in your Outbox with one frustrating word next to it: Queued.Fri, 11 Sep 2026 07:28:25 GMTTanya TarasenkoDMARC