We use external services for sending e-mail messages because:
- it is reliable,
- external services provide additional analytic options:
delivery and opening-message and link notifications. These options help to set necessary notifications for the sender and, finally, make the comunication process with the client more flexible.
- depending on the tariff of the external service, the user can send up to 12 000 every month without additional fees. If you already use one of these services, you can use additional advantages of your commercial tariff.
4. Now "Approve It" works with the following external services:

• SendPulse
  
• UniSender