Blog

Practical insights on email deliverability, security, and infrastructure — based on real findings from working with 450+ organizations.

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Email Deliverability

SendGrid 2FA Issue Locks Access to 50+ Client Accounts

June 20, 2025

2FA verification failures locked multiple accounts, halting business operations for over 36 hours.

Email Deliverability

Is External Destination Verification Required for DMARC Reporting?

June 19, 2025

EDV records appear optional since DMARC reports often send successfully without explicit external destination verification.

Email Deliverability

DMARC p=reject Reduces Spoofing, But Doesn’t Guarantee Full Protection

June 18, 2025

Even with p=reject, some email servers may still accept spoofed messages, creating residual risks.

Email Deliverability

Why Email Templates Must Stay Under 102KB

May 16, 2025

Oversized email templates risk clipping, broken tracking, compliance issues, and reduced inbox placement across providers.

Email Security

Suspicious Google Calendar Emails Trigger DMARC Failures

May 15, 2025

Attackers exploited Google Calendar to send phishing emails, causing DMARC failures for Yahoo recipients.

Email Deliverability

Microsoft DMARC Reports Expose Recipient Domains – A Critical Risk

April 29, 2025

Microsoft DMARC aggregate reports reveal recipient domains, creating insider threats and increasing phishing risk.

Email Deliverability

Targeted Phishing Exploits Real-Time Delivery Data at Major Logistics Company

April 18, 2025

Precision phishing leveraged live DPD delivery data, exposing potential system-level breaches and GDPR risks.

Email Security

Why Some Domains Are Heavily Spoofed While Others Are Safe

March 24, 2025

Spoofing targets depend on domain exposure, authentication gaps, and automation—not company size or staff count.

Email Security

How a Rare 3-Character Domain Exposes the Reality of Email Spoofing

March 14, 2025

Even small, lightly-used domains can be exploited for spoofing, phishing, and scams without owner knowledge.

Email Security

Why Email Open Rates and Click-Through Rates Can Be Misleading

March 12, 2025

Open and click rates don’t always reflect true engagement—manual replies tell the real story.

Email Deliverability

Mailchimp Sending Non-Authenticated Emails Despite DKIM and DMARC

March 1, 2025

Mailchimp rejects emails due to DMARC p=reject, sending 100% non-authenticated despite DKIM setup.

Email Security

Email Security is the Foundation of Email Deliverability

February 21, 2025

DKIM, SPF, and DMARC form the foundation for secure email delivery and prevent spoofing.