The Buzzmark blog
Notes on deliverability, transactional email, EU data and building a product company in the open.
Showing posts from May 2026 Show all
The Buzzmark Team
Webhooks 101: Reacting to Deliveries, Bounces, and Opens in Real Time
Sending an email is only half the story. Webhooks tell your application what happened next — delivered, bounced, opened, complained — so you can react automatically instead of polling and guessing.
Read the post →The Buzzmark Team
SMTP or API? Two Ways to Send with Buzzmark
You can hand mail to Buzzmark over classic SMTP or over an HTTP API. Both reach the same place; the right choice depends on your stack, your existing code, and how much control you want.
Read the post →The Buzzmark Team
Return-Path, Envelope Sender, and Why Bounces Need a Home
There are two "from" addresses on every email, and most people only know about one. The hidden one — the Return-Path — is where bounces go and where SPF is checked. Here's why it matters.
Read the post →The Buzzmark Team
Dedicated vs. Shared IPs: Which Do You Actually Need?
Dedicated IPs sound like the professional choice, but for most senders a shared IP is genuinely better. Here's how to tell which side of the line you're on.
Read the post →