orange_profile-2.0.x-dev/config/install/swiftmailer.transport.yml

transport: sendmail
smtp_host: 127.0.0.1
smtp_port: 25
smtp_encryption: ''
smtp_credential_provider: swiftmailer
smtp_credentials:
  swiftmailer:
    username: ''
    password: ''
  key:
    username: ''
    password: ''
sendmail_path: /usr/sbin/sendmail
sendmail_mode: bs
spool_directory: ''