muser-8.x-1.x-dev/config/install/queue_mail.settings.yml

queue_mail_keys: "muser_system_post_projects_start\r\nmuser_system_post_projects_end\r\nmuser_system_review_applications_start\r\nmuser_system_review_applications_end\r\nmuser_system_after_round\r\nmuser_system_student_accepted\r\nmuser_system_student_rejected\r\n"
queue_mail_queue_time: 45
queue_mail_queue_wait_time: 0
threshold: 50
requeue_interval: 10800