Email infrastructure that scales without burning your domain
Transactional and high-volume sending: throughput, per-recipient personalisation, suppression, and the deliverability work that decides whether messages reach the inbox at all.
When sending becomes an engineering problem
Volume outgrew the queue
We have scaled a sending system’s throughput without trading away deliverability — batching, rate shaping and provider fallbacks included.
Delivery is fine, inbox placement is not
Authentication, domain and IP separation by traffic type, warm-up plans, and complaint handling that actually suppresses.
Every message needs to be different
Per-recipient content assembled from live data at send time, rendered and tested without an hour-long build step.
Deliverability is an operational discipline, not a one-off configuration. It needs owners, dashboards and a habit of separating traffic types.
Separate the traffic, protect the reputation
Password resets and marketing digests must never share a sending reputation. We split domains, subdomains and IP pools by traffic type so a campaign misfire cannot stop customers logging in.
Suppression is treated as a system of record: bounces, complaints and unsubscribes are enforced centrally, before any queue, with no path around them.
Throughput with backpressure
Sending fast is easy; sending fast without tripping provider limits or piling up retries is not. We shape rate per provider and per recipient domain, keep queues bounded, and make a provider outage a failover rather than a backlog.
Everything is instrumented per campaign and per segment — accepted, delivered, opened, complained — so a deliverability change is visible in hours, not after a month of declining conversions.
A sending domain takes months to build reputation and one bad campaign to lose it.
Work like this usually touches
Sending at volume, or about to be?
Send the context you have — a repo, a diagram, or three paragraphs of frustration. We reply within one business day.