auctions-1.0.x-dev/modules/auctions_mail/auctions_mail.routing.yml

auctions_mail.settings:
  path: '/admin/config/system/auctions-mail'
  defaults:
    _form: '\Drupal\auctions_mail\Form\AuctionsMail'
    _title: 'Auctions Mail notices'
  requirements:
    _permission: 'administer site configuration'