diff --git a/src/Transports/Mailgun.ts b/src/Transports/Mailgun.ts
index 19890a1..188216f 100644
--- a/src/Transports/Mailgun.ts
+++ b/src/Transports/Mailgun.ts
@@ -108,7 +108,8 @@ export class MailgunTransport {
 
     Object.keys(tags).forEach((key) => form.append(key, tags[key]))
     Object.keys(headers).forEach((key) => form.append(key, headers[key]))
-    Object.keys(recipients).forEach((key) => form.append(key, recipients[key]))
+    Object.keys(recipients).forEach((key) => form.append('to', recipients[key]))
+
     form.append('message', mail.message.createReadStream(), { filename: 'message.mime' })
 
     this.logger.trace(