How I fixed Python OSError: [Errno 99] Cannot assign requested address

When binding a socket, you see an error message like

In my case, the issue was that I was trying to bind the specific IP address  192.168.1.100 but the computer running the script did not have said IP address configured on any interface.

so I needed to change the bind IP address to either  0.0.0.0 to listen to ANY IP address or I needed to change  192.168.1.100 to the IP address of the host computer I am running the script on.

Docker container [Errno 99] Cannot assign requested address

Note that for Docker containers, either you need to run them in network_mode: host to use the host’s network systemd, or you need to bind to the container’s IP address. You can not bind to the host’s IP address from the contaienr unless using  network_mode: host ! But you can forward the ports from the host, binding to a specific IP address.

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Email - Cannot assign requested address #117

@Al3xDaniels

Al3xDaniels commented Jul 2, 2023

@ross-spencer

ross-spencer commented Jul 2, 2023

Sorry, something went wrong.

  • 👍 1 reaction

@subashz

subashz commented Jul 13, 2023 • edited

@mattjhill

mattjhill commented Jul 21, 2023

Subashz commented jul 21, 2023, subashz commented jul 21, 2023 • edited.

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[solved] docker email not working.

Added by Rajko Albrecht about 3 years ago

We start using openproject therefore we setup a docker container.

But no emails are send. We configured an outbound smtp server but it does not send any email.

in uri /health_check_/_all it tells us that openproject is ignoring the smtp settings but tries to send emails to localhost - inside a docker container a bit a problem: mail: FAILED ActionMailer::Base at localhost:25 is not accepting connections: 'Cannot assign requested address - connect(2) for "localhost" port 25' (0.000s)

  • how can we fix this? Inside the openproject container of course no smtp daemon is running
  • for what is the smtp host setting in configuration page when not used for sending emails?

Replies (4)

Re: docker email not working - added by greg glockner about 3 years ago.

I work with Rajko Albrecht and can add the following details:

  • We configured the email settings in the URL /admin/mail_notifications and the test email is working
  • We also tried setting the following inside the Docker compose file:

The SMTP server on our LAN does not use authentication. Nevertheless, the URL /admin/mail_notifications still shows the error: "mail: FAILED ActionMailer::Base at localhost:25 is not accepting connections: 'Cannot assign requested address - connect(2) for "localhost" port 25' (0.001s)"

  • Project status emails do not seem to be sending, even after verifying email settings in an individual profile

We solved the problem: OpenProject isn't compatible with an SMTP server that has no authentication. We reconfigured to our upstream SMTP server, and it's working now.

RE: [Solved] Docker email not working - Added by Max Mutzge about 3 years ago

Hi Greg, Great that you could solve it. Thank you for posting the solution here!

Kind regards

RE: [Solved] Docker email not working - Added by 柯 末末 over 2 years ago

     修改上游smtp服务器,是怎么做的?能指导一下吗?

Unable to get SMTP function to work

Dear Reader,

I have a problem with the SMTP function in vaultwarden (also with passbolt, tried it if i could get that to work). I have a microsoft exchange account, and I have a SendGrid that I used to get SMTP to work. both of them don’t work. I use the latest variant of Vaultwarden.

SMTP Settings in admin portal: Enabled Default: true Host: smtp.office365.com Secure SMTP: starttls Port: 587 From Address: email address From Name: Vaultwarden Username: email address Password: “the password of the mailaddress” SMTP Auth mechanism: “Login” SMTP connection timeout: 15 Server name sent during HELO: -

I have SMTP enabled on the Office account and I have enabled basic authentications. Still nothing.

I get 2 errors: [2022-09-17 08:19:25.440][vaultwarden::mail][ERROR] SMTP Connection error: Cannot assign requested address (os error 99) [2022-09-17 08:19:25.441][response][INFO] (test_smtp) POST /admin/test/smtp => 400 Bad Request

With kind regards, Mathijs

Looks like a hostname resolving issues. Could you post the Support String which you can generate from the diagnostics page?

Your environment (Generated via diagnostics page)

  • Vaultwarden version: v1.25.2
  • Web-vault version: v2022.6.2
  • Running within Docker: true (Base: Debian)
  • Environment settings overridden: true
  • Uses a reverse proxy: true
  • IP Header check: true (X-Real-IP)
  • Internet access: true
  • Internet access via a proxy: false
  • DNS Check: true
  • Time Check: true
  • Domain Configuration Check: false
  • HTTPS Check: true
  • Database type: SQLite
  • Database version: 3.35.4
  • Clients used:
  • Reverse proxy and version:
  • Other relevant information:

Config (Generated via diagnostics page)

Environment settings which are overridden: SIGNUPS_ALLOWED, SIGNUPS_VERIFY, ADMIN_TOKEN

Please try to enable debug logging. LOG_LEVEL=debug (or trace) and SMTP_DEBUG=true .

Then try again, and see what the output of the logs tell.

[2022-09-17 13:55:17.830][request][INFO] GET /alive [2022-09-17 13:55:17.831][response][INFO] (alive) GET /alive => 200 OK [2022-09-17 13:55:47.112][vaultwarden::api::core::two_factor][DEBUG] Sending notifications for incomplete 2FA logins [2022-09-17 13:55:57.215][vaultwarden::mail][DEBUG] SMTP lettre::transport::smtp::Error { kind: Connection, source: Os { code: 99, kind: AddrNotAvailable, message: “Cannot assign requested address”, }, } [2022-09-17 13:55:57.215][vaultwarden::mail][ERROR] SMTP Connection error: Cannot assign requested address (os error 99) [2022-09-17 13:55:57.216][response][INFO] (test_smtp) POST /admin/test/smtp => 400 Bad Request [2022-09-17 13:56:17.920][request][INFO] GET /alive [2022-09-17 13:56:17.920][response][INFO] (alive) GET /alive => 200 OK

Still, it looks like resolving the domain seems to have some issues. Could you run the following from the docker host and see if that works?

Where vaultwarden is the name of your container of course.

I just tested sendgrid my self, and it works just fine for me.

Screenshot_20220917-192731

I am not allowed to post more links because I am a new user, so I uploaded a screenshot

Ik could be me, but I’m not seeing any ipv4 addresses. It could be that your docker config is having issues with ipv6 maybe??

I also changed your user level, so links should be possible now.

version: “2” services: vaultwarden: image: vaultwarden/server:latest container_name: vaultwarden volumes: - /home/docker/VW:/data/ ports: -8080:80 networks: ngx: ipv4_address: 172.19.0.3 restart: unless-stopped environment: - LOG_LEVEL=debug - SMTP_DEBUG=true - SIGNUPS_ALLOWED=true - USE_SYSLOG=true - SIGNUPS_VERIFY=false - EXTENDED_LOGGING=true - ADMIN_TOKEN=password networks: ngx: external: true

This is my docker-compose.yml

Hmm, i think it had something to do with ipv6. Like, it tries to use ipv6, but it can’t connect to it and causes this failure.

Maybe try to add the following to the compose file.

That should disable all ipv6 within the container, maybe that will help.

[2022-09-18 06:49:08.263][vaultwarden::mail][ERROR] SMTP Connection error: Cannot assign requested address (os error 99) [2022-09-18 06:49:08.264][response][INFO] (test_smtp) POST /admin/test/smtp => 400 Bad Request [2022-09-18 06:49:08.264][_][WARN] Remote left: client disconnect before response started. [2022-09-18 06:49:54.536][vaultwarden::api::core::two_factor][DEBUG] Sending notifications for incomplete 2FA logins [2022-09-18 06:49:54.751][request][INFO] GET /alive [2022-09-18 06:49:54.752][response][INFO] (alive) GET /alive => 200 OK [2022-09-18 06:50:07.835][vaultwarden::mail][DEBUG] SMTP lettre::transport::smtp::Error { kind: Connection, source: Os { code: 99, kind: AddrNotAvailable, message: “Cannot assign requested address”, }, } [2022-09-18 06:50:07.835][vaultwarden::mail][ERROR] SMTP Connection error: Cannot assign requested address (os error 99) [2022-09-18 06:50:07.836][response][INFO] (test_smtp) POST /admin/test/smtp => 400 Bad Request Again… Same error

Very strange. Still looks like it can’t resolve or either connect to the ip for some reason.

Could you set the logging to trace and see if that provides some more info.

[2022-09-18 08:09:22.249][vaultwarden::mail][DEBUG] SMTP lettre::transport::smtp::Error { kind: Connection, source: Os { code: 99, kind: AddrNotAvailable, message: “Cannot assign requested address”, }, } [2022-09-18 08:09:22.249][vaultwarden::mail][ERROR] SMTP Connection error: Cannot assign requested address (os error 99) [2022-09-18 08:09:22.250][response][INFO] (test_smtp) POST /admin/test/smtp => 400 Bad Request [2022-09-18 08:09:22.250][tracing::span][TRACE] encode_headers; [2022-09-18 08:09:22.250][tracing::span::active][TRACE] → encode_headers; [2022-09-18 08:09:22.250][tracing::span::active][TRACE] ← encode_headers; [2022-09-18 08:09:22.250][tracing::span][TRACE] – encode_headers; [2022-09-18 08:09:22.250][mio::poll][TRACE] deregistering event source from poller

Do I need to put “” or around the smtp address or is it just plain text?

Just plain/text is more then enough, no quotes needed. Same goes for all others btw, unless there are some special characters in there or spaces, which for domains and email addresses isn’t the case.

And for the authentication?

Of you refer to smtp_auth_mechanism , that can be without quotes too, but that shouldn’t matter that much.

hmm. Should we try a different smtp service provider? maybe we get more info than that of office365.

with the smtp settings for sendgrid i get this: [2022-09-18 10:11:42.616][request][INFO] GET /alive [2022-09-18 10:11:42.616][response][INFO] (alive) GET /alive => 200 OK [2022-09-18 10:12:03.178][vaultwarden::mail][DEBUG] SMTP timeout error: lettre::transport::smtp::Error { kind: Connection, source: Custom { kind: TimedOut, error: “connection timed out”, }, } [2022-09-18 10:12:03.179][vaultwarden::mail][ERROR] SMTP timeout error: Connection error: connection timed out [2022-09-18 10:12:03.180][response][INFO] (test_smtp) POST /admin/test/smtp => 400 Bad Request

Enabled: true Host: smtp.sendgrid.net Secure SMTP: starttls Port: 587 From Address: [email protected] From Name: relay Username: apikey Password: “the api key” SMTP Auth mechanism: “Login” SMTP connection timeout: 15

Related Topics

Troubleshooting

Unable to connect: Can’t assign requested address

Last updated: January 11, 2023

Note:  This article is for users with technical experience. For other users, please  contact the ExpressVPN Support Team for direct assistance .

Users who recently changed to ExpressVPN may see an error message in their diagnostics similar to this:

MANAGEMENT: Socket bind failed on local address [AF_INET]180.168.41.175:49314: Can't assign requested address

If you see this message, the problem may be that your host file is missing some important lines. To confirm:

  • Open  Terminal
  • In Terminal, type “ ping localhost “
  • You should see something like the below: 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.064 ms 64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.069 ms 64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.303 ms
  • To stop, hit  Control + C

If you see an IP address that is NOT 127.0.0.1, your host file is missing some important lines. To fix this:

  • Open  Terminal  via Spotlight Search (command + space, then type “terminal”)
  • In Terminal, enter  sudo nano /private/etc/hosts
  • Enter your admin password. You will not be able to see which characters you input so type carefully.
  • Your host file will be loaded onto Terminal. Use the arrow keys to navigate between lines in the file.
  • Enter the below three lines if you do not see them in your host file: 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost

flush dns

  • Press  Control + X to quit editing the host file
  • You will need to flush the existing DNS cache for the entries to be effective. See instructions on flushing the DNS cache .
  • Open ExpressVPN and connect to a server location

Need help? Contact the ExpressVPN Support Team via Live Chat for immediate assistance .

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cannot assign requested address email

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This question has been flagged

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Hello to all the experts, 

Recently I tried to add a user to my database but I am getting this error when I send the invitation by email. 

Mail delivery failed via SMTP server 'localhost'. error: 99 Cannot assign requested address

I am using odoo 10.0 community version. Can someone help me figure this issue out. All your help will be much appreciated as I am a beginner and I would like to get all the help needed from this wonderful forum of experts. 

Avatar

This can be because of your outgoing mail configuration. You can refer this link to set it  outgoing_mail_conf  

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Cannot Assign Requested Address

Cannot Assign Requested Address: Troubleshooting Minecraft Server Joining Issues

Photo of Samuel Agwah

Networking communications can come up with specific error messages, and “cannot assign requested address” is among these errors. This is common to Java-based client-server applications like Minecraft , a popular game in Java that communicates with the server and other machines using TCP and sockets.

This error is down to specific issues such as busy servers, troubleshooting issues, busy IP addresses, DNS problems, and local ports which do not have binds. We will walk you through how to identify and solve the problem.

What Does “Cannot Assign Requested Address” Mean?

Common causes of the “cannot assign requested address” error, how to fix the “cannot assign requested address” error, advanced troubleshooting for “cannot assign requested address” error.

“Cannot Assign Requested Address” means that operating systems reject PuTTY’s parameters when they are invalid for constructing a network connection. The error usually occurs without PuTTY attempting to make any connections or when an attempt is made to connect to an invalid port number.  

The error message might appear when IP addresses are incorrect, and ports need to be correctly forwarded, or when running an address, and the subdomain is pointing to a non-local IP for your device, i.e., not 192.168.x.x

…also read: How to Get Cave Only World in Minecraft [ver. 1.8 – 1.16 – 1.19]

Common causes of a “cannot assign requested address error” are incorrect mapping, busy IP address, DNS problems, and local ports which do not have binds. It can occur while using web and application servers such as WebLogic and Jetty.

Typically, the port is in use, or the requested local address cannot be assigned. The port might be busy because something has already started using it (another instance of the server), or another example left the port in the CLOSE_WAIT state.

In addition, The message “cannot assign requested address” suggests that the hostname/IP you try to bind does not resolve to a local network interface. 

Troubleshooting the common causes of the error can help in resolving the issue:

  • Examine your mapping order before starting up your server. 
  • Cross-check your port number if there is a mismatch or an incorrect number. 
  • Check if the ports are correctly forwarded.
  • Check the hostname linking your IP address.

An error like this indicates that the IP address is unreliable. It is also possible that there is a mismatch. To fix the error, do a correct mapping before starting your web server/application Server. When you start your Web server, it listens on a port. For example, jetty listens on 8080 8084 for HTTP and HTTPS traffic. 

These are responsible for binding a socket to a port and local address. Also, the hostname you give them (dev host or localhost) is what they use in Linux or Windows to resolve the domain name into an IP address. Thus an incorrect mapping in this order would bring out the error message.

The most important thing is not to confuse the “cannot assign requested address” error with an address already in use. Refrain from assuming the two processes are listening on the same port when you get this error. Try to recall the mapping by thinking of the hostname to IP address resolution issue, and cross check content of the “etc/host” files in both Windows and Linux. 

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Samuel Agwah

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RTNETLINK answers: Cannot assign requested address

can't delete 192.168.0.206 from ovs_bond0

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I solved this by running these commands:

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cannot assign requested address email

IMAGES

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COMMENTS

  1. smtp

    smtp - Airflow: Cannot assign requested address error while using emailoperator - Stack Overflow Airflow: Cannot assign requested address error while using emailoperator Ask Question Asked 4 years, 10 months ago Modified 4 years, 7 months ago Viewed 8k times 5 Unable to receive email on task failure or even using EmailOperator Hi Guys,

  2. Cannot assign requested address

    This is happening consistently. From inspecting logs, I have found that the slave is only able to send one status update to the server, and then is never able to send another update, always failing on the call to connect () "Cannot assign requested address (99). Oddly enough, the slave is able to send several other updates to the server, and ...

  3. email

    postfix: Cannot assign requested address Ask Question Asked 5 years, 4 months ago Modified 5 years, 4 months ago Viewed 10k times 3 I have app that uses postfix. When i send an email from one user to another, works well, as you can see here

  4. SMTP: [Errno 99] Cannot assign requested address #724

    docker logs sentry_onpremise_worker_1 - [Errno 99] Cannot assign requested address errors appear; What you expected to happen. I should be able to send mail with the default configuration included with the ./install.sh script

  5. How I fixed Python OSError: [Errno 99] Cannot assign requested address

    OSError: [Errno 99] Cannot assign requested address Solution: In my case, the issue was that I was trying to bind the specific IP address 192.168.1.100 but the computer running the script did not have said IP address configured on any interface. how-i-fixed-python-oserror-errno-99-cannot-assign-requested-address.txt 📋 Copy to clipboard ⇓ Download

  6. Emails are not sending; (99) Cannot assign requested address

    Description When checking the Exim Mainlog, Where are the Exim logs?, I see "Cannot assign requested address". How can I resolve this? Workaround The issue comes from the IP not being bound to the server. Make sure that the IP is listed in /etc/mailips and if it is not, add the IP to the mailips file. The format of /etc/mailips is:

  7. Unable to send email: [Errno 99] Cannot assign requested address

    You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window.

  8. Email

    Email - Cannot assign requested address #117 Closed Al3xDaniels opened this issue on Jul 2, 2023 ¡ 8 comments commented on Jul 2, 2023 Sign up for free to join this conversation on GitHub . Already have an account? Sign in to comment I am setting up a new instance all is work except email functionality.

  9. [Solved] Docker email not working

    We configured the email settings in the URL /admin/mail_notifications and the test email is working. We also tried setting the following inside the Docker compose file: SMTP_ADDRESS=smtp.ourdomain.com SMTP_HOST=smtp.ourdomain.com SMTP_PORT=25 SMTP_DOMAIN=ourdomain.com. The SMTP server on our LAN does not use authentication.

  10. Unable to get SMTP function to work

    From Address: email address. From Name: Vaultwarden. Username: email address. Password: "the password of the mailaddress". SMTP Auth mechanism: "Login". SMTP connection timeout: 15. Server name sent during HELO: -. I have SMTP enabled on the Office account and I have enabled basic authentications. Still nothing.

  11. Repl.it SMTPLIB OSError: [Errno 99] Cannot assign requested address

    2 Answers Sorted by: 3 For reasons unknown to me, a small configuration of commands fixed it. New part of the script for sending the email looks like this: server = smtplib.SMTP ('smtp.seznam.cz', 587) server.starttls () server.ehlo () server.login ('[email protected]', "my_email_password") server.sendmail (sender, reciever, msg) server.quit ()

  12. Unable to Connect: Can't Assign Requested Address

    To stop, hit Control + C. If you see an IP address that is NOT 127.0.0.1, your host file is missing some important lines. To fix this: Open Terminal via Spotlight Search (command + space, then type "terminal") In Terminal, enter sudo nano /private/etc/hosts. Enter your admin password.

  13. Mail delivery failed via SMTP server 'localhost'. error: 99 Cannot

    Mail delivery failed via SMTP server 'localhost'. error: 99 Cannot assign requested address I am using odoo 10.0 community version. Can someone help me figure this issue out. All your help will be much appreciated as I am a beginner and I would like to get all the help needed from this wonderful forum of experts. ... , Recently I tried to add a ...

  14. Cannot Assign Requested Address: Troubleshooting Minecraft Server

    Common causes of a "cannot assign requested address error" are incorrect mapping, busy IP address, DNS problems, and local ports which do not have binds. It can occur while using web and application servers such as WebLogic and Jetty. Typically, the port is in use, or the requested local address cannot be assigned.

  15. RTNETLINK answers: Cannot assign requested address

    1 Answer Sorted by: 0 I solved this by running these commands: ip addr del 192.168..206/32 dev vdsm ip addr del 192.168..209/32 dev vdsm Share Improve this answer Follow edited Dec 21, 2023 at 23:10 music2myear 2,003 3 30 54 answered Nov 30, 2023 at 8:35 Silver Lee 1 1 Add a comment You must log in to answer this question.

  16. How to fix 'Cannot assign requested address?'

    ERROR: Failed to bind to socket. errno 99 (Cannot assign requested address). IpAddress 192.0.2.77 Port 4185 AddrLength 16 I've been re-reading Beej's Guide to Network Programming but not finding a clue. This is UDP so a connection should not be required to bind. The firewall is off. Where else should I be looking? c++ sockets udp ip bind Share

  17. Python

    1 Answer Sorted by: 9 By checking errno.h, errno 99 is EADDRNOTAVAIL. The man page bind (2) says: EADDRNOTAVAIL A nonexistent interface was requested or the requested address was not local. It is often caused by a wrong IP address. You can use the command ifconfig to check whether your machine has this IP address. Share Improve this answer Follow