Added DropMail API

README.md

@@ -638,6 +638,7 @@ API | Description | Auth | HTTPS | CORS |
 ### Email
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
+| [DropMail](https://dropmail.me/api/#live-demo) | GraphQL API for creating and managing ephemeral e-mail inboxes | No | Yes | Unknown |
 | [Guerrilla Mail](https://www.guerrillamail.com/GuerrillaMailAPI.html) | Disposable temporary Email addresses | No | Yes | Unknown |
 | [Mailtrap](https://mailtrap.docs.apiary.io/#) | A service for the safe testing of emails sent from the development and staging environments | `apiKey` | Yes | Unknown |
 | [Sendgrid](https://sendgrid.com/docs/api-reference/) | A cloud-based SMTP provider that allows you to send emails without having to maintain email servers | `apiKey` | Yes | Unknown |