added Guerrilla mail api (#2909)

README.md

@@ -631,6 +631,7 @@ API | Description | Auth | HTTPS | CORS |
 ### Email
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
+| [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 |
 | [Sendinblue](https://developers.sendinblue.com/docs) | A service that provides solutions relating to marketing and/or transactional email and/or SMS | `apiKey` | Yes | Unknown |