I'm getting this error message trying to send a bulk mail from civimail:
Finished execution of Send Scheduled Mailings with result: Failure, Error message: API permission check failed for Group/get call; insufficient permission: require access CiviCRM
Who is is that needs permission? The logged in drupal user? Civicrm contact? SMTP user? Someone else?
The mail accounts from which the mail is sent ask for a username and password. Same question, what sort of user is needed here?