Case study

Mailbob

An email newsletter platform for personal brands and small business: a message editor, a subscriber base, analytics and delivery. Our own product, built end to end — from the signup form to billing.

Client: A joint product of K2 Studio and Koddrio, USA
Years: 2023 — ongoing
Scope: Product management, project management, development (frontend, backend), hosting, architecture
Stack: PHP — API, React — interface, Python — server management

The problem

Twitter shut down Revue, and TinyLetter was closing next. Newsletter authors were left between free services that vanish without warning and email-marketing platforms where the newsletter is just one feature next to funnels, tags and a CRM.

What was needed was a platform that does one thing and does all of it: write the letter, build the list, deliver. Simple on the outside — which means entirely on us on the inside: deliverability, unsubscribes, spam complaints, billing.

What we did

The whole product, not one layer of it.

A block editor for the letter: HTML and plain-text versions from a single draft.
Signup forms with double opt-in, and a widget for someone else’s site.
Analytics: opens, clicks, unsubscribes and spam placements.
Your own sender domains on the higher plans.
A REST API and a WordPress plugin with blocks for the editor.
Volume plans: 10,000, 50,000 and 100,000 emails a month.

Result

1M emails a month That is what the platform sends now, every month, with no manual involvement. The service launched on paid subscriptions across three plans and has run itself ever since: taking subscribers, sending, analytics and payment.

Operations

A million emails a month is not about volume but about sender reputation. Double opt-in, tracking unsubscribes and spam complaints, separate sender domains on the higher plans — these are all parts of one job: getting the letter into the inbox rather than the spam folder.

The infrastructure is managed by a separate layer in Python: the sending servers live their own life and do not depend on the application code.

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