Smyfony4 Swift SMTP configuration for Uberspace

.env.local

MAILER_PASSWORD=12345

swiftmailer.yaml

# e.g. in config/packages/swiftmailer.yaml
swiftmailer:
  delivery_addresses: ['mymail@example.com']
  delivery_whitelist:
    # all email addresses matching these regexes will be delivered
    # like normal, as well as being sent to dev@example.com
    - '/@example\.de$/'
  transport: smtp
  username: USERNAME
  password: '%env(resolve:MAILER_PASSWORD)%'
  host: SERVER.uberspace.de
  port: 587
  timeout: 30
  local_domain: 'uber.space'
  encryption:  tls
  auth_mode: login
  sender_address: 'USERNAME@uber.space'
  antiflood:
    threshold: 99
    sleep: 0
  logging: true
  spool:
    type: memory