The Buzzmark blog
Practical writing on transactional email: deliverability, SPF/DKIM/DMARC, inbound mail, EU data rules and how Buzzmark is built.
Engineering 5 min read
Buzzmark Is Opening a Second Sending Location in the Netherlands
Today every message Buzzmark delivers leaves from our servers in Spain. In December 2026 we're adding a second sending location in the Netherlands. Here's why, what it changes for reliability, and the little you need to do.
Read the post →Deliverability 4 min read
We've doubled our sending infrastructure in Spain
Over the past few weeks we doubled the size of the infrastructure that delivers your mail. Nothing changes on your side. Here's what we added, how new capacity is brought online safely, and why we did it.
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How Inbound Email Works in Buzzmark: MX Records, Forwarding, and Webhooks
Buzzmark does not just send. Point an MX record at us and we will receive mail for your domain, then forward it to your preferred inbox, deliver it to a webhook, or do both at once. Here is how inbound works and how to set it up.
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Getting Started with Buzzmark: From Zero to Your First Send
New to Buzzmark? Here's the whole path in one place — from verifying a domain to sending your first message and watching it land — with links to the concepts behind each step.
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Writing Subject Lines and Preheaders for Transactional Email
Transactional subject lines have the opposite job from marketing ones: not to entice, but to be instantly, unmistakably clear. A short guide to the two lines of text your recipient sees before they open.
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The Deliverability Metrics Worth Watching Every Week
You don't need a dashboard full of vanity numbers. A handful of metrics tell you almost everything about the health of your sending — here's what to actually watch, and what each one is warning you about.
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List Hygiene for Transactional Senders
"List hygiene" sounds like a marketing concern, but transactional senders have addresses to keep clean too. A short guide to why even receipts and resets benefit from a tidy list.
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A Pre-Flight Checklist for Your First Production Email
Before you flip the switch on real mail to real users, run through this. Ten checks that catch the mistakes that otherwise turn into spam-foldered launches and 2 a.m. debugging.
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Retries, Rate Limits, and Queues: What Happens After You Hit Send
"Send" doesn't mean "delivered." Between your app and the inbox sits a queue, a set of retry rules, and the receiving server's rate limits. Knowing what happens in that gap makes you a calmer, better sender.
Read →2 min read
Open and Click Tracking: What It Tells You, and What It Costs
Tracking opens and clicks gives you engagement data — but it adds a pixel, rewrites your links, and raises privacy questions. When it's worth it, when to turn it off, and why the answer differs by mail stream.
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