We apologize for the problem with the email marketing sending system. We understand it’s import for email campaigns to be delivered at their scheduled times.
The error occurred when an upstream service we use for inlining the CSS used in the email campaign messages changed its URL. This change of URL prevented campaign messages from being rendered. Without rendered messages no campaigns could be sent out.
We have updated the URL of the inline CSS service and normal campaign sending operations have renewed.
Bottlenose 2.9, currently in development, uses a completely different system for rendering its campaign messages. This should prevent this type of issue from occurring in the future.