Symptom: Email notifications fail to be received. <br> Problem: Server logs resemble: 15/12/2016 2:54:54 PM NotifyPI Warning Profile Description: Playground. Notification attempt return code= 55 15/12/2016 2:54:54 PM NotifyPI Verbose curl: (55) MAIL failed: 530 15/12/2016 2:54:54 PM NotifyPI Error Failed to send notification using profile Playground. This message will be retried This is caused… Continue reading NotifyPI fails with cURL error 55