emails can't go out of my container.

[ghost]

Hi, im not docker guru so it's might be(probably) on my side.

my instance of taiga can't send emails.

This is the error it give when it try:

[05/Dec/2017 19:21:23] "PATCH /api/v1/users/5 HTTP/1.0" 500 135988
ERROR:2017-12-05 19:21:25,753: Internal Server Error: /api/v1/users/5
Traceback (most recent call last):
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/exception.py", line 42, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 249, in _legacy_get_response
    response = self._get_response(request)
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/local/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/src/taiga-back/taiga/base/api/viewsets.py", line 106, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/local/lib/python3.5/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
    return view_func(*args, **kwargs)
  File "/usr/src/taiga-back/taiga/base/api/views.py", line 461, in dispatch
    response = self.handle_exception(exc)
  File "/usr/src/taiga-back/taiga/base/api/views.py", line 458, in dispatch
    response = handler(request, *args, **kwargs)
  File "/usr/src/taiga-back/taiga/users/api.py", line 147, in partial_update
    email.send()
  File "/usr/local/lib/python3.5/site-packages/django/core/mail/message.py", line 342, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "/usr/local/lib/python3.5/site-packages/django/core/mail/backends/smtp.py", line 100, in send_messages
    new_conn_created = self.open()
  File "/usr/local/lib/python3.5/site-packages/django/core/mail/backends/smtp.py", line 58, in open
    self.connection = connection_class(self.host, self.port, **connection_params)
  File "/usr/local/lib/python3.5/smtplib.py", line 251, in __init__
    (code, msg) = self.connect(host, port)
  File "/usr/local/lib/python3.5/smtplib.py", line 336, in connect
    self.sock = self._get_socket(host, port, self.timeout)
  File "/usr/local/lib/python3.5/smtplib.py", line 307, in _get_socket
    self.source_address)
  File "/usr/local/lib/python3.5/socket.py", line 694, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/usr/local/lib/python3.5/socket.py", line 733, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known

This is the docker network connected to the container:

docker network inspect 4f22daa9df2f
[
    {
        "Name": "mytaiga_taiganw",
        "Id": "4f22daa9df2f325e4fcaa259e99ba93deb370d629fe4f9bd371cb3e842603afa",
        "Created": "2017-12-05T13:43:44.406590674-05:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.29.0.0/16",
                    "Gateway": "172.29.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "0d920ba57672603becaa5c2e06090307d0a078320bf29d641bc01abfa3abf61b": {
                "Name": "mytaiga_postgres_1",
                "EndpointID": "58ad8c5b89414424a9194903671ebc0eb6846cddf06ce2826476f9a48527d883",
                "MacAddress": "02:42:ac:1d:00:02",
                "IPv4Address": "172.29.0.2/16",
                "IPv6Address": ""
            },
            "eabd298f5af66f9dd119bdaec2eeac7acb57120cee8d3f50fa9310108c26a9ed": {
                "Name": "mytaiga_taiga_1",
                "EndpointID": "8945eea789e8f2a1be497a40bca064aef85e63896e63dda4f9a099b5b1f24299",
                "MacAddress": "02:42:ac:1d:00:03",
                "IPv4Address": "172.29.0.3/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

From inside the container I can't either ping google.com and 8.8.8.8 witch is probably the source of the problem.

[jcmmv00]

I have the same issue when runs in aws