Last Friday, I received the following email from InfusionSoft, the email service I am using for our newsletters and auto-responders:
We have received notification from several Internet Service Providers that your recipients are reporting your emails as spam at a rate which exceeds their allowed thresholds. In order to prevent any further spam complaints from your contacts and to protect your email sending reputation, we have temporarily disabled all email sending capabilities.
To restore email sending service to your Infusionsoft application and learn how you can prevent future spam complaints, please contact the Infusionsoft Customer Care Staff at the information listed below.