You cannot send messages if your account's messaging credit balance reaches $0.

Negative credit balance

Received message charges accumulate as a negative balance on your account after the balance reaches $0:

Settings pop-out

Settings > Plans & Billing

Unsent messages

Unsent messages are placed in a 'suspended messages' queue for 72 hours and are sent automatically if credit is added before this time has elapsed.

How can I clear suspended messages?

To clear all suspended messages from your account, please contact our support team at: help@sakari.io