Connection refused using proxy

[lookandhate]

Email Provider

yadnex.ru

What happened?

When i am trying to send request using proxy i get error like this:
"smtp": {
"error": {
"type": "SmtpError",
"message": "io: socks5 error: Error with reply: Connection refused."
}
},
I checked proxy and it's working

Relevant log output

[2023-02-21T15:22:18Z DEBUG reacher] [email=[email protected]] Checking email "[email protected]"
[2023-02-21T15:22:18Z DEBUG reacher] [email=[email protected]] Found the following syntax validation: SyntaxDetails { address: Some(EmailAddress("[email protected]")), doma
in: "yandex.ru", is_valid_syntax: true, username: "sadn3sspwnz", normalized_email: Some("[email protected]"), suggestion: None }
[2023-02-21T15:22:18Z DEBUG trust_dns_proto::xfer::dns_handle] querying: yandex.ru MX
[2023-02-21T15:22:18Z DEBUG trust_dns_resolver::name_server::name_server_pool] sending request: [Query { name: Name("yandex.ru"), query_type: MX, query_class: IN }]
[2023-02-21T15:22:18Z DEBUG trust_dns_resolver::name_server::name_server] reconnecting: NameServerConfig { socket_addr: 192.168.65.7:53, protocol: Udp, tls_dns_name: None, trust_nx
_responses: false, bind_addr: None }
[2023-02-21T15:22:18Z DEBUG trust_dns_proto::xfer] enqueueing message: [Query { name: Name("yandex.ru"), query_type: MX, query_class: IN }]
[2023-02-21T15:22:18Z DEBUG trust_dns_proto::udp::udp_stream] created socket successfully
[2023-02-21T15:22:18Z DEBUG trust_dns_proto::udp::udp_client_stream] received message id: 41504
[2023-02-21T15:22:18Z DEBUG trust_dns_resolver::error] Response:41504:RD,RA:NoError:1/0/0
[2023-02-21T15:22:18Z DEBUG trust_dns_resolver::error] Response:41504:RD,RA:NoError:1/0/0
[2023-02-21T15:22:18Z DEBUG reacher] [email=[email protected]] Found the following MX hosts: ["10 mx.yandex.ru."]
[2023-02-21T15:22:18Z DEBUG trust_dns_proto::xfer::dns_exchange] io_stream is done, shutting down
[2023-02-21T15:22:18Z DEBUG reacher] [email=[email protected]] Found the following misc details: MiscDetails { is_disposable: false, is_role_account: false, gravatar_url: None
}
[2023-02-21T15:22:18Z DEBUG reacher] [email=[email protected]] Check SMTP [attempt=1] on [host=mx.yandex.ru.:587]
[2023-02-21T15:22:18Z INFO  fast_socks5::client] Connected @ 109.94.211.17:64105
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] Send version and method len [5, 2]
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] client auth methods supported: [0, 2]
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] Socks version (5), method chosen: 2.
[2023-02-21T15:22:18Z INFO  fast_socks5::client] Password will be used
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] Auth: [version: 1, is_success: 0]
[2023-02-21T15:22:18Z INFO  fast_socks5::client] Requesting headers `Some(Domain("mx.yandex.ru", 587))`...
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] TargetAddr::Domain
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] Bytes long version: [5, 1, 0, 3, 12, 109, 120, 46, 121, 97, 110, 100, 101, 120, 46, 114, 117, 2, 75, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] Bytes shorted version: [5, 1, 0, 3, 12, 109, 120, 46, 121, 97, 110, 100, 101, 120, 46, 114, 117, 2, 75]
[2023-02-21T15:22:18Z DEBUG fast_socks5::client] Padding: 19
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] Reply received: [version: 5, reply: 5, rsv: 0, address_type: 1]
[2023-02-21T15:22:26Z DEBUG reacher] [email=[email protected]] Closing [host=mx.yandex.ru:587], because of error 'Io(Custom { kind: ConnectionRefused, error: Socks5Error(ReplyE
rror(ConnectionRefused)) })'.
[2023-02-21T15:22:26Z DEBUG reacher] [email=[email protected]] Got result for [attempt=1] on [host=mx.yandex.ru.:587], [result=Err(SmtpError(Io(Custom { kind: ConnectionRefused
, error: Socks5Error(ReplyError(ConnectionRefused)) })))]
[2023-02-21T15:22:26Z DEBUG reacher] [email=[email protected]] Potential greylisting detected, retrying.
[2023-02-21T15:22:26Z DEBUG reacher] [email=[email protected]] Check SMTP [attempt=2] on [host=mx.yandex.ru.:587]
[2023-02-21T15:22:26Z INFO  fast_socks5::client] Connected @ 109.94.211.17:64105
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] Send version and method len [5, 2]
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] client auth methods supported: [0, 2]
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] Socks version (5), method chosen: 2.
[2023-02-21T15:22:26Z INFO  fast_socks5::client] Password will be used
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] Auth: [version: 1, is_success: 0]
[2023-02-21T15:22:26Z INFO  fast_socks5::client] Requesting headers `Some(Domain("mx.yandex.ru", 587))`...
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] TargetAddr::Domain
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] Bytes long version: [5, 1, 0, 3, 12, 109, 120, 46, 121, 97, 110, 100, 101, 120, 46, 114, 117, 2, 75, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] Bytes shorted version: [5, 1, 0, 3, 12, 109, 120, 46, 121, 97, 110, 100, 101, 120, 46, 114, 117, 2, 75]
[2023-02-21T15:22:26Z DEBUG fast_socks5::client] Padding: 19
[2023-02-21T15:22:34Z DEBUG fast_socks5::client] Reply received: [version: 5, reply: 5, rsv: 0, address_type: 1]
[2023-02-21T15:22:34Z DEBUG reacher] [email=[email protected]] Closing [host=mx.yandex.ru:587], because of error 'Io(Custom { kind: ConnectionRefused, error: Socks5Error(ReplyE
rror(ConnectionRefused)) })'.
[2023-02-21T15:22:34Z DEBUG reacher] [email=[email protected]] Got result for [attempt=2] on [host=mx.yandex.ru.:587], [result=Err(SmtpError(Io(Custom { kind: ConnectionRefused
, error: Socks5Error(ReplyError(ConnectionRefused)) })))]
[2023-02-21T15:22:34Z DEBUG reacher] Sending error to Sentry: Smtp(SmtpError(Io(Custom { kind: ConnectionRefused, error: Socks5Error(ReplyError(ConnectionRefused)) })))
[2023-02-21T15:22:34Z INFO  reacher] 172.17.0.1:60026 "POST /v0/check_email HTTP/1.1" 200 "-" "PostmanRuntime/7.30.0" 16.543121247s
[2023-02-21T15:22:34Z DEBUG hyper::proto::h1::io] flushed 578 bytes

[amaury1093]

Is the proxy yours? Is it a SOCK5 proxy? To debug this, we will need the proxy's logs.

[lookandhate]

It's not my proxy, I purchased it. And yes, it's socks5 proxy

[amaury1093]

Unless you have access to the proxy's logs, there's unfortunately not much I can do here.

[lookandhate]

Okey, I'll try to get proxy logs. Do not, please, close issue yet

[lookandhate]

So, sadly we can't access proxy logs and moreover, we can't check are 25, 487 and so on ports open or not. Thus, there is probably proxy problem.

[Nyceane]

Hey @lookandhate I am running into same problem, this time with port 25 open. I've tried commercial proxy and found out keep receiving that error so I setup my own dante server on ec2 (with port 25 open), but every time reacher hits it I keep getting that eror. If I use username/password via dante then I get a

"error": { "type": "SocksError", "message": "Auth method unacceptable[255]." }

Proxy server runs as following. dante refuse to log somehow and I am trying to figure that out.

May 6 01:22:30 ip-172-31-1-178 systemd[1]: systemd-tmpfiles-clean.service: Deactivated successfully. May 6 01:22:30 ip-172-31-1-178 systemd[1]: Finished Cleanup of Temporary Directories. May 6 01:24:28 ip-172-31-1-178 danted[1242]: info: sigterm(): exiting on signal 15 May 6 01:24:28 ip-172-31-1-178 systemd[1]: Stopping SOCKS (v4 and v5) proxy daemon (danted)... May 6 01:24:28 ip-172-31-1-178 danted[1242]: alert: mother[1/1]: shutting down May 6 01:24:28 ip-172-31-1-178 systemd[1]: danted.service: Deactivated successfully. May 6 01:24:28 ip-172-31-1-178 systemd[1]: Stopped SOCKS (v4 and v5) proxy daemon (danted). May 6 01:24:28 ip-172-31-1-178 systemd[1]: Starting SOCKS (v4 and v5) proxy daemon (danted)... May 6 01:24:29 ip-172-31-1-178 systemd[1]: Started SOCKS (v4 and v5) proxy daemon (danted). May 6 01:24:29 ip-172-31-1-178 danted[1293]: info: Dante/server[1/1] v1.4.2 running