Blogs
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BIMI
Why BIMI Adoption Should Wait Until You Have a Complete Sender Inventory
BIMI lets brands display their logo in supported email clients, but deploying it without auditing your sender inventory first causes authentication failures that undermine the trust signal you are trying to build. This post covers the prerequisites, what gets missed, and how to audit your sending infrastructure before you add a BIMI record.
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Deliverability
The Email Security Platform Evaluation Framework Every MSP Needs in 2026
A practical evaluation framework for MSPs choosing email security platforms for client bundles. Covers the three dimensions that matter, what most reviews miss, and how DMARC monitoring fits in.
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SPF
Why Office 365 Direct Send Emails Get Flagged as Spam: SPF and DKIM Alignment Explained
Legitimate emails sent via Office 365 direct send get flagged as spam or phishing because the From domain does not align with the sending IP. Here is what causes it and how to fix it.
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DMARC
How Exchange Online Connectors Create a Domain Spoofing Risk You Cannot See
Domain-scoped inbound connectors in Exchange Online accept mail for your domain from any tenant that routes through them. The connector validation screen does not tell you this. Here is what actually happens and how to detect it.
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DMARC
Why Your DMARC Monitoring Is Missing Things (And How to Find Them)
Most DMARC failures are not caught by the sender. They are caught by the recipient. Here is why your own monitoring setup is blind to its gaps, and how to audit it properly.
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The SPF and DKIM Configuration Mistakes That Break Email Delivery
SPF and DKIM misconfigurations silently break email delivery and expose domains to spoofing. This guide walks through the most common mistakes sysadmins make, explains why each one fails, and shows how to diagnose and fix them.
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DMARC
What Does "temperror" Mean in Your Yahoo DMARC Report When DKIM Passes?
Yahoo DMARC reports can show DKIM pass and aligned DKIM temperror at the same time. This guide explains why that happens, why it is not a contradiction, and what action to take.
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DMARC
The DMARC Mistake Even Experts Make: What the LearnDMARC Incident Teaches Every Organization
The author of LearnDMARC recently caught their own DMARC setup failing. Here is what that incident teaches about why expertise does not prevent email authentication mistakes.
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Deliverability
Why Your Newsletter Links Get Flagged as Phishing by Recipient Email Gateways
Legitimate email senders running click-tracking sometimes get phishing abuse complaints filed against their domain by automated gateway scanners, not human recipients. Here is what is happening and what to do about it.
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DKIM
Stale DKIM Selectors After Registrar Migration: Are They a Security Risk?
Old DKIM selector records left behind after changing registrars or email providers are not a direct security risk, but they create operational clutter. Here is what to do about them.