Connection Setup

Follow these 3 steps once. After that, every reply you get lands automatically in the dashboard and gets classified by AI.

Set up your Reply domain

One domain that receives all replies — never used for sending

Pending

Buy any cheap domain ($8–12/yr) — for example replies.youragencyname.com or r.yourdomain.com. This domain only receives replies, it never sends. So it never gets blacklisted.

Your reply domain

Connect Mailgun (free)

Mailgun routes incoming replies to this dashboard via webhook

Pending

Go to mailgun.com → create a free account
Click Add Domain → enter your reply domain
Add the DNS records from Step 1
Go to Receiving → Routes → Create Route
Expression: catch_all()
Action: forward("YOUR_WEBHOOK_URL") (see below)
Click Create Route

Your webhook URL (paste into Mailgun)

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Optional: Mailgun webhook signing key (for security)

Add Reply-To to your email template

One header in every email — that's all Jarda needs to add

Done once

In your sending script / email template, set the Reply-To header like this. Replace CAMPAIGN and VARIATION with the actual values per batch.

Reply-To header (add to every email)

Reply-To: r+CAMPAIGN+VARIATION@replies.yourdomain.com

Example for batch A of "plumbers-may-2026" campaign:

Reply-To: r+plumbers-may-2026+A@replies.yourdomain.com

Python SMTP example (if using smtplib)

msg['Reply-To'] = f"r+{campaign}+{variation}@replies.yourdomain.com"

Log each batch send (call from your script after send)

curl -X POST https://your-tracker.vercel.app/api/send \
-H "Content-Type: application/json" \
-d '{"c":"plumbers-may-2026","v":"A","n":37500,"subject":"Quick question"}'