Can I send while my browser is closed?

Yes. Campaigns run on a background worker powered by pg_cron, so sending continues, retries on failure and honours per-SMTP throttling even after you close the tab.

How long does it take to set up?

Most senders are sending within 5 minutes — add SMTP credentials, click Test, import contacts via CSV, pick a template, and hit Send.

Are opens and clicks tracked?

Yes. A 1×1 tracking pixel and link rewriting capture opens and clicks per recipient. You can disable tracking per campaign.

Does it handle unsubscribes automatically?

Yes — every email includes a one-click unsubscribe link and the List-Unsubscribe header, with auto-suppression on bounce and abuse complaints.

RAPID SMTP

How it works

From SMTP to inbox in four steps

RAPID SMTP sits on top of your existing SMTP and handles everything around it — contacts, scheduling, rendering, tracking, retries.

Connect your SMTP

Add SMTP host, port, username and password. Click Test — we verify the handshake in real-time. Connect Gmail, Amazon SES, Mailgun, Postmark, SendGrid or your own VPS. Add multiple SMTPs and route different campaigns through different senders.

Real-time connection test
TLS/SSL auto-detection
AES-256-GCM encrypted at rest
Multiple accounts per workspace

Import your contacts

Upload a CSV or add subscribers manually. Group, tag and segment them. Duplicates are detected on import — you decide skip or update. Custom fields (company, country, plan, anything) are usable as merge tags later.

CSV import with preview
Smart de-duplication
Tags, groups and custom fields
Built-in suppression list

Design your email

Use the HTML editor with live preview. Drop in {{name}} or any custom merge tag. Save reusable templates. Pick a ready-made template from the gallery to start in seconds.

HTML editor + live preview
Merge tags ({{name}}, {{company}}…)
10+ ready-made templates
Per-recipient personalisation

Send & track

Send now or schedule. The background worker queues, throttles and retries automatically — even after you close the browser. Watch opens and clicks update live. Per-campaign and per-SMTP analytics.

Background queue (pg_cron)
Schedule for any future time
Open / click tracking
Unsubscribe handling built-in

Under the hood

Built for reliability

No magic — just solid engineering between you and the inbox.

Background queue

Built on pg_cron + worker. Survives browser close, retries on failure.

Bring your own SMTP

We never resell email. Your sender reputation, your deliverability.

Encrypted credentials

SMTP passwords are AES-256-GCM encrypted. Never returned to the browser.

Real-time analytics

Pixel tracking + link rewriting. Stats per campaign, recipient and SMTP.

Suppression & unsubscribe

One-click unsubscribe, List-Unsubscribe header, auto-suppression on bounce.

Throttling

Per-SMTP rate limits respect your provider's hourly/daily caps.

Architecture

What happens when you click Send

You

Click send/schedule

Queue

Campaign batched

Worker

pg_cron picks up batches

Your SMTP

We auth + deliver

Inbox

Opens & clicks tracked

Ready to try it?

Free forever plan included. Add your SMTP, send your first campaign in minutes.