Knowledge Hub
Notes from the deliverability desk.
Practical write-ups on outbound email, deliverability, and what we're seeing run campaigns for clients on Mailheight and the Hamcut Ecosystem.
Jul 13, 2026
Why Spamhaus Flags Your IP Pattern Even If You're Legitimate
Spamhaus scores infrastructure, not intent. If your sending pattern mirrors snowshoe spam, you'll get listed. Here's why and how to fix it.
Read article →Jul 13, 2026
Why Email Deliverability Is a Security Issue
Poor email deliverability isn't just a marketing problem. It signals security risks that can damage sender reputation and inbox placement.
Read article →