Blog

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

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Email Deliverability

Choose the Right Domain to Improve Email Deliverability

July 23, 2025

Selecting the correct domain and TLD is crucial for avoiding spam filters and improving deliverability.

Email Security

DMARC Reject Blocks Spoofing Attempt on Personal Domain

July 16, 2025

Strict DMARC policy prevented a spoofing attack, protecting domain despite spam filter bypass.

Email Deliverability

Yahoo CFL Domains Not Recognized by Mailchimp Spam Reports

July 16, 2025

Some Yahoo-owned domains bypass Mailchimp spam report recognition, leaving unsubscribed users active.

Email Deliverability

Why Top-Level Domains Still Matter for Email Deliverability

July 16, 2025

Top level domain choice significantly impacts email deliverability and spam filtering outcomes for marketing campaigns.

Email Deliverability

Office 365 SMTP Issues with Proofpoint and Gmail Send Mail As

June 27, 2025

Office 365 emails fail sending via Gmail Send Mail As despite SMTP, Proofpoint, and authentication settings enabled.

Email Deliverability

New SendGrid Dedicated IP Immediately Listed on DNS Blacklists

June 21, 2025

Dedicated SendGrid IPs appearing on multiple DNSBLs can hurt email deliverability and sender reputation.

Email Deliverability

Analyzing Google Postmaster: Unexpected Spam Report Spikes

June 20, 2025

Google Postmaster graphs sometimes show high spam rates despite low email traffic or legitimate messages.

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 Security

How to Protect Your Domain and Email When Switching SaaS Providers

June 19, 2025

Always export your DNS zone to prevent service disruptions and protect email and domain security.

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

When Gradual Sending Doesn’t Prevent Spam Folder Placement

June 18, 2025

Even with careful guidance, emails can still land in spam without proper authentication and monitoring.