Connect Mailgun to EonMailer

Step 1 — Provider settings

1. Client workspace → Settings → Email provider → Mailgun.
2. Select US or EU region (must match Mailgun account).
3. Paste Private API key from Mailgun Settings → API Keys.
4. Enter sending domain exactly as in Mailgun (e.g. mail.client.com).
5. Save and test connection.

Warning EU keys against US API base (or reverse) always fail — region is not cosmetic.

Step 2 — Domain verification

Domain must show Active in Mailgun before bulk send. See Add domain.

Mirror domain status in EonMailer Domains.

Step 3 — Webhooks

1. Copy EonMailer webhook URL.
2. Mailgun → Sending → Webhooks → add for delivered, failed, complained, unsubscribed.
3. Use signing key if EonMailer validates signatures (enable in app if offered).

Step 4 — Test

Send test message; confirm Mailgun logs show 200 OK and EonMailer activity updates.

Troubleshoot Mailgun if needed.