Send-Time Optimization Actually Works — Here's the Proof
Send time optimization HubSpot skeptics are usually right about the wrong things. Here's the math on why recipient-level STO actually moves engagement.
Read more →
Blog
Notes from the inside of email AI.
Deliverability, send-time optimization, audience engagement, and the future of email marketing - written by the people who build Seventh Sense.
Shared vs. Dedicated IP for HubSpot Email: When to Switch
HubSpot dedicated IP isn't an automatic win. Here's the volume threshold where it makes sense, when shared is actually better, and what warming actually requires.
Read more →
The Gmail Promotions Tab: How Your HubSpot Emails End Up There (and How to Escape)
The Gmail promotions tab HubSpot problem isn't always a problem. Here's how Gmail decides, what triggers Promotions, and when escape is worth chasing.
Read more →
Seed Lists Demystified: What They Catch That Your Inbox Won't
Email seed list testing is the only way to see provider-specific placement before your real recipients do. Here's how to set one up that actually catches problems.
Read more →
The App Is the Render Target: How We Built Our HubSpot Site Backwards
How we rebuilt a HubSpot site as code in git, deployed it over the API, and learned where the generative AI workflow helped and broke.
Read more →
Email Delivery vs. Inbox Placement: Why HubSpot's Delivery Rate Lies to You
Email inbox placement is what actually drives engagement, but HubSpot only reports delivery. Here's the difference, and how to measure what really matters.
Read more →
SPF, DKIM, and DMARC for HubSpot Sender Reputation
How SPF, DKIM, and DMARC protect HubSpot sender reputation, where each protocol falls short, and which DNS mistakes hurt inbox placement.
Read more →
How to Audit Your HubSpot Portal for Email Collisions in 15 Minutes
A practical 15-minute HubSpot email audit you can run today to find collisions, over-messaged contacts, and the workflows quietly damaging your deliverability.
Read more →
Over-Messaging: The Silent Deliverability Killer in B2B Email
Email over-messaging quietly degrades deliverability long before recipients complain. Here's how mailbox providers measure it, and how to see it in your portal.
Read more →