@Sim , Running XF 2.2.8 Patch 1 with SparkPost Mail Transport 2.2.1 ( https://xenforo.com/community/resources/sparkpost-mail-transport-for-xf-2-2.7990/ ).
Getting this server error:
SparkPost\SparkPostException: Job Hampel\SparkPostMail:MessageEvent: {"errors":[{"param":"from","message":"from...