:password => ENV['SMTP_PASSWORD'].presence,
:domain => ENV['SMTP_DOMAIN'] || ENV['LOCAL_DOMAIN'],
:authentication => ENV['SMTP_AUTH_METHOD'] == 'none' ? nil : ENV['SMTP_AUTH_METHOD'] || :plain,
- :ca_file => ENV['SMTP_CA_FILE'].presence,
+ :ca_file => ENV['SMTP_CA_FILE'].presence || '/etc/ssl/certs/ca-certificates.crt',
:openssl_verify_mode => ENV['SMTP_OPENSSL_VERIFY_MODE'],
:enable_starttls_auto => ENV['SMTP_ENABLE_STARTTLS_AUTO'] || true,
:tls => ENV['SMTP_TLS'].presence,