It looks as though Amaterasu is using Travis, but build emails are not reaching the list.
The mail system is now able to accept build emails from Travis, without needing to moderate each one. To ensure that the emails reach the list, one of the list moderators needs to 'allow' the email 'bui...@travis-ci.org' for the appropriate list. This can be done in Whimsy: https://whimsy.apache.org/committers/moderationhelper Select the 'allow-subscribe' option. Sebb.