Postal / 502 Bad Gateway nginx/1.10.3 (Ubuntu), как исправить?

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events {
	worker_connections 768;
	# multi_accept on;
}

http {

	##
	# Basic Settings
	##

	sendfile on;
	tcp_nopush on;
	tcp_nodelay on;
	keepalive_timeout 65;
	types_hash_max_size 2048;
	# server_tokens off;

	# server_names_hash_bucket_size 64;
	# server_name_in_redirect off;

	include /etc/nginx/mime.types;
	default_type application/octet-stream;

	##
	# SSL Settings
	##

	ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
	ssl_prefer_server_ciphers on;

	##
	# Logging Settings
	##

	access_log /var/log/nginx/access.log;
	error_log /var/log/nginx/error.log;

	##
	# Gzip Settings
	##

	gzip on;
	gzip_disable "msie6";

	# gzip_vary on;
	# gzip_proxied any;
	# gzip_comp_level 6;
	# gzip_buffers 16 8k;
	# gzip_http_version 1.1;
	# gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

	##
	# Virtual Host Configs
	##

	include /etc/nginx/conf.d/*.conf;
	include /etc/nginx/sites-enabled/*;
}


#mail {
#	# See sample authentication script at:
#	# http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
# 
#	# auth_http localhost/auth.php;
#	# pop3_capabilities "TOP" "USER";
#	# imap_capabilities "IMAP4rev1" "UIDPLUS";
# 
#	server {
#		listen     localhost:110;
#		protocol   pop3;
#		proxy      on;
#	}
# 
#	server {
#		listen     localhost:143;
#		protocol   imap;
#		proxy      on;
#	}
#}

web:
  # Хост, на котором будет доступен интерфейс управления
  host: postal.office-reklama.ru
  # ротокол, который запрашивает интерфейс управления, должен происходить на
  protocol: https

fast_server:
  # This can be enabled to enable click & open tracking on emails. It is disabled by
  # default as it requires a separate static IP address on your server.
  enabled: false
  bind_address:

general:
  # This can be changed to allow messages to be sent from multiple IP addresses
  use_ip_pools: false

main_db:
  # Specify the connection details for your MySQL database
  host: 127.0.0.1
  username: postal
  password: **********
  database: postal

message_db:
  # Specify the connection details for your MySQL server that will be house the
  # message databases for mail servers.
  host: 127.0.0.1
  username: postal
  password: **************
  prefix: postal

rabbitmq:
  # Specify the connection details for your RabbitMQ server.
  host: 127.0.0.1
  username: postal
  password: **************
  vhost: /postal

ns:
  # Specifies the DNS record that you have configured. Refer to the documentation at
  # https://github.com/atech/postal/wiki/Domains-&-DNS-Configuration for further
  # information about these.
  mx_records:
    - mx.postal.example.com
  smtp_server_hostname: postal.example.com
  spf_include: spf.postal.example.com
  return_path: rp.postal.example.com
  route_domain: routes.postal.example.com
  track_domain: track.postal.example.com

smtp:
  # Specify an SMTP server that can be used to send messages from the Postal management
  # system to users. You can configure this to use a Postal mail server once the
  # your installation has been set up.
  host: 127.0.0.1
  port: 2525
  username: # Complete when Postal is running and you can
  password: # generate the credentials within the interface.
  from_name: Postal
  from_address: postal@yourdomain.com

rails:
  # This is generated automatically by the config initialization. It should be a random
  # string unique to your installation.
  secret_key: 9ca7f25bfb9eb187ac944ceef4fdddc566471b663417dfbf1324064ddbd2860928d54cf87da474aac1044fe5cb5bcd1881cd04ca05def3d8d428a4efae7ae231fedf5d25f0e44f726bd74674781c317b16c22ca635724f09da6ecdca1f60ed2675246415f76342d630cd9a5a88421ec848236200bd28c32a306848cfa7268161

# These are the default configuration options that will be used if they aren't overriden
# in your postal.yml configuration file. No changes should be made to this file for
# your installation.

# You can refer to this for a complete listing all available configuration options.

web:
  host: postal.office-reklama.ru
  protocol: https

general:
  use_ip_pools: false
  exception_url:
  maximum_delivery_attempts: 18
  maximum_hold_expiry_days: 7
  use_local_ns_for_domains: false

web_server:
  bind_address: 127.0.0.1
  port: 5000
  max_threads: 5

fast_server:
  enabled: false
  bind_address:
    # Set appropriate IP addresses to listen on. These should be dedicated IP
    # addresses just used for this server. You should list IPv4 and IPv6 addresses
    # as appropriate.
    # - 1.2.3.4
    # - abcd:a:b:c:d::1
  port: 80
  ssl_port: 443
  proxy_protocol: false
  default_private_key_path: # Defaults to config/fast_server.key
  default_tls_certificate_path: # Defaults to config/fast_server.cert

main_db:
  host: 127.0.0.1
  port: 3306
  username: postal
  password:
  database: postal
  pool_size: 5

logging:
  stdout: false
  root: # Automatically determined based on config root
  max_log_file_size: 20
  max_log_files: 10
  greylog:
    host:
    port: 12201

message_db:
  host: 127.0.0.1
  port: 3306
  username: postal
  password:
  prefix: postal

rabbitmq:
  host: 127.0.0.1
  port: 5672
  username: postal
  password:
  vhost: /postal

workers:
  quantity: 1
  threads: 4

smtp_server:
  port: 25
  tls_enabled: false
  tls_certificate_path: # Defaults to config/smtp.cert
  tls_private_key_path: # Defaults to config/smtp.key
  tls_ciphers:
  ssl_version: SSLv23
  proxy_protocol: false
  log_connect: true
  strip_received_headers: false
  max_message_size: 14 # size in Megabytes

smtp_relays:
  -
    hostname:
    port: 25
    ssl_mode: Auto

dns:
  mx_records:
    - mx.postal.office-reklama.ru
  smtp_server_hostname: postal.office-reklama.ru
  spf_include: spf.postal.example.com
  return_path: rp.postal.office-reklama.ru
  route_domain: routes.mail.office-reklama.ru
  track_domain: track.mail.office-reklama.ru
  helo_hostname: # By default, this will be the same as the `smtp_server_hostname`
  dkim_identifier: postal
  domain_verify_prefix: postal-verification
  custom_return_path_prefix: psrp

smtp:
  host: 127.0.0.1
  port: 25
  username: # Complete when Postal is running and you can
  password: # generate the credentials within the interface.
  from_name: Postal
  from_address: postal@yourdomain.com

rails:
  environment: production
  secret_key:

spamd:
  enabled: false
  host: 127.0.0.1
  port: 783

clamav:
  enabled: false
  host: 127.0.0.1
  port: 2000

smtp_client:
  open_timeout: 30
  read_timeout: 60