~6,000/s
Accepted
Emails accepted by the API and stored durably, p99 under 27 ms.
Email infrastructure
you run yourself.
A complete delivery engine with reputation built in. One binary, no external database, open source.
const res = await fetch("https://mail.example.com/emails", { method: "POST", headers: { Authorization: `Bearer ${Bun.env.BUNZZLE_KEY}`, "Idempotency-Key": "order-42", }, body: JSON.stringify({ from: "Shop <hello@example.com>", to: ["ana@example.org", "ben@example.net", "cleo@example.com", "dan@example.io"], subject: "Your order has shipped", html: "<p>It is on its way.</p>", }),});
$ sudo bunzzle doctor[ok] EHLO name: mail.example.com[ok] DKIM self-check: verifies against live DNS[ok] DMARC: TXT _dmarc.example.com is correct11 ok, 0 warnings, 0 problems
ana@example.orgmx1.example.org · TLS 1.3 · 250 2.0.0 OK
ben@example.netmx.example.net · TLS 1.3 · 250 OK
cleo@example.com421 4.7.0 try again later · retrying
dan@example.iomail.example.io · TLS 1.2 · 250 OK
One command,
and it's running.
The installer checks the signed release, creates a user and a systemd sandbox for each of the six roles and starts them. Set three values, then bunzzle doctor tells you what is left to fix.
$ curl -fsSLO https://github.com/bunzzle/bunzzle/releases/latest/download/install.sh$ sudo sh install.sh
BUNZZLE_EHLO_NAME=mail.example.comBUNZZLE_SOURCE_IPS=203.0.113.10BUNZZLE_PUBLIC_URL=https://mail.example.comBUNZZLE_INBOUND_PORT=25
Benchmarks
A 2-CPU, 2 GB Linux machine, with the load generator and test mail servers on the same CPUs. See the method
1,480/s
Delivered
End to end, with STARTTLS and two DKIM signatures each.
1.2ms
CPU per email
Two thirds of it is the RSA signature.
285MB
Memory
All roles together, during sustained sending.