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<@U04UQ68083H> ory kratos, how can i use mailslurp...
# ory-copilot
s
@chilly-king-10285 ory kratos, how can i use mailslurper to send verification email?
b
A message from kapa.ai
To use MailSlurper with Ory Kratos for sending verification emails, you need to configure Kratos to use MailSlurper as its SMTP server. MailSlurper is a development SMTP server that captures emails sent by Kratos, allowing you to view them in a web UI. Here's how you can set it up: 1. Start MailSlurper Run MailSlurper on your local machine. By default, it listens on port 
4436
for the web UI and on port 
1025
for SMTP. 2. Configure Ory Kratos to Use MailSlurper In your Kratos configuration file (typically 
kratos.yml
), set the SMTP settings to point to MailSlurper:
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yaml    courier:      smtp:        connection_uri: <smtp://localhost:1025/?skip_ssl_verify=true>
This tells Kratos to send all emails (including verification emails) to the MailSlurper SMTP server running locally. 3. Trigger a Verification Email When a user registers or requests email verification, Kratos will send the verification email to MailSlurper. 4. View the Email in MailSlurper Open the MailSlurper UI at [http://127.0.0.1:4436](http://127.0.0.1:4436) to see the captured verification email. You can then click the verification link or use the code as needed. This setup is demonstrated in the Ory Kratos quickstart, which uses MailSlurper to show how email verification works in a development environment. The quickstart guide provides more context on the network architecture and how MailSlurper fits into the workflow [Kratos Quickstart - Network Architecture](https://www.ory.sh/docs/kratos/quickstart#network-architecture), [Kratos Quickstart - Email Verification](https://www.ory.sh/docs/kratos/quickstart#email-verification). Note: MailSlurper is intended for development and testing only. For production, use a real SMTP server. If you need more details on configuring SMTP for Kratos, refer to the [Ory Kratos Email and SMS Guide](https://www.ory.sh/docs/guides/email-sms).
s
@chilly-king-10285 my settings
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courier:
  smtp:
    connection_uri: <smtp://md-delete-mailslurper-1:1025/?skip_ssl_verify=true>
mailslurper log
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2025-05-29 13:38:29 time="2025-05-29T06:38:29Z" level=info msg="Worker 1 queued to handle connections from 172.26.0.6:44828" who="SMTP Server Pool"
2025-05-29 13:38:39 time="2025-05-29T06:38:39Z" level=info msg="Connection closed" connection="172.26.0.6:44828" who="Connection Manager"
2025-05-29 13:38:39 time="2025-05-29T06:38:39Z" level=info msg="Connection closed" connection="172.26.0.6:44828" who="Connection Manager"
2025-05-29 13:38:40 time="2025-05-29T06:38:40Z" level=info msg="Worker 2 queued to handle connections from 172.26.0.6:48992" who="SMTP Server Pool"
2025-05-29 13:38:40 time="2025-05-29T06:38:40Z" level=info msg="Connection closed" connection="172.26.0.6:44828" who="Connection Manager"
2025-05-29 13:38:50 time="2025-05-29T06:38:50Z" level=info msg="Connection closed" connection="172.26.0.6:48992" who="Connection Manager"
2025-05-29 13:38:51 time="2025-05-29T06:38:51Z" level=info msg="Worker 3 queued to handle connections from 172.26.0.6:40958" who="SMTP Server Pool"
2025-05-29 13:38:51 time="2025-05-29T06:38:51Z" level=info msg="Connection closed" connection="172.26.0.6:44828" who="Connection Manager"
2025-05-29 13:39:01 time="2025-05-29T06:39:01Z" level=info msg="Connection closed" connection="172.26.0.6:40958" who="Connection Manager"
2025-05-29 13:39:02 time="2025-05-29T06:39:02Z" level=info msg="Worker 4 queued to handle connections from 172.26.0.6:39904" who="SMTP Server Pool"
2025-05-29 13:39:02 time="2025-05-29T06:39:02Z" level=info msg="Connection closed" connection="172.26.0.6:48992" who="Connection Manager"
2025-05-29 13:39:10 time="2025-05-29T06:39:10Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:12 time="2025-05-29T06:39:12Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:12 time="2025-05-29T06:39:12Z" level=info msg="Connection closed" connection="172.26.0.6:39904" who="Connection Manager"
2025-05-29 13:39:13 time="2025-05-29T06:39:13Z" level=info msg="Worker 5 queued to handle connections from 172.26.0.6:48516" who="SMTP Server Pool"
2025-05-29 13:39:13 time="2025-05-29T06:39:13Z" level=info msg="Connection closed" connection="172.26.0.6:44828" who="Connection Manager"
2025-05-29 13:39:15 time="2025-05-29T06:39:15Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:16 time="2025-05-29T06:39:16Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:16 time="2025-05-29T06:39:16Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:17 time="2025-05-29T06:39:17Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:23 time="2025-05-29T06:39:23Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:23 time="2025-05-29T06:39:23Z" level=info msg="Connection closed" connection="172.26.0.6:48516" who="Connection Manager"
2025-05-29 13:39:24 time="2025-05-29T06:39:24Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:24 time="2025-05-29T06:39:24Z" level=info msg="Mail collection page 1 retrieved" who=ServiceController
2025-05-29 13:39:24 time="2025-05-29T06:39:24Z" level=info msg="Worker 6 queued to handle connections from 172.26.0.6:35324" who="SMTP Server Pool"
2025-05-29 13:39:24 time="2025-05-29T06:39:24Z" level=info msg="Connection closed" connection="172.26.0.6:40958" who="Connection Manager"
2025-05-29 13:39:34 time="2025-05-29T06:39:34Z" level=info msg="Connection closed" connection="172.26.0.6:35324" who="Connection Manager"
I get error
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2025-05-29 13:39:34 {"audience":"application","error":{"message":"read tcp 172.26.0.6:35324->172.26.0.3:1025: i/o timeout","stack_trace":"\<http://ngithub.com/ory/kratos/courier.(*SMTPChannel).Dispatch|ngithub.com/ory/kratos/courier.(*SMTPChannel).Dispatch>\n\t/project/courier/smtp_channel.go:110\ngithub.com/ory/kratos/courier.(*courier).DispatchMessage\n\t/project/courier/courier_dispatcher.go:35\ngithub.com/ory/kratos/courier.(*courier).DispatchQueue\n\t/project/courier/courier_dispatcher.go:82\ngithub.com/ory/kratos/courier.(*courier).watchMessages.func1\n\t/project/courier/courier.go:119\ngithub.com/cenkalti/backoff.RetryNotify\n\t/go/pkg/mod/github.com/cenkalti/backoff@v2.2.1+incompatible/retry.go:37\ngithub.com/cenkalti/backoff.Retry\n\t/go/pkg/mod/github.com/cenkalti/backoff@v2.2.1+incompatible/retry.go:24\ngithub.com/ory/kratos/courier.(*courier).watchMessages\n\t/project/courier/courier.go:118\nruntime.goexit\n\t/usr/local/go/src/runtime/asm_arm64.s:1223"},"level":"error","message_from":"<mailto:no-reply@ory.kratos.sh|no-reply@ory.kratos.sh>","message_id":"01de3af9-7c45-4a8e-9d8d-adbbedc50846","message_nid":"d7c395a7-f0f6-4836-9d7c-1fe3cfddbdd6","message_subject":"Please verify your email address","message_template_type":"verification_code_valid","message_type":"email","msg":"Unable to send email using SMTP connection.","service_name":"Ory Kratos","service_version":"v1.3.1","smtp_server":"md-delete-mailslurper-1:1025","smtp_ssl_enabled":false,"time":"2025-05-29T06:39:34.893967048Z"}
2025-05-29 13:39:35 {"audience":"application","level":"warning","message_id":"01de3af9-7c45-4a8e-9d8d-adbbedc50846","message_nid":"d7c395a7-f0f6-4836-9d7c-1fe3cfddbdd6","message_subject":"Please verify your email address","message_template_type":"verification_code_valid","message_type":"email","msg":"Message was abandoned because it did not deliver after 6 attempts","service_name":"Ory Kratos","service_version":"v1.3.1","time":"2025-05-29T06:39:35.90803584Z"}
please guide me how to fix?
b
A message from kapa.ai
Based on your logs and configuration, Ory Kratos is attempting to send emails to MailSlurper but is encountering an i/o timeout, and after several retries, the message is abandoned. This usually indicates a network connectivity issue or that MailSlurper is not accepting or processing the SMTP connection as expected. Here are the steps you should check, based on Ory's documentation and common troubleshooting practices: 1. Check Container Networking If you are running Kratos and MailSlurper in Docker, ensure both containers are on the same Docker network and can resolve each other's hostnames. The hostname 
md-delete-mailslurper-1
must be resolvable from the Kratos container. Try using the container's IP or ensure the service name is correct. 2. Verify MailSlurper is Running and Listening MailSlurper should be running and listening on port 
1025
for SMTP. You can check this by running:
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sh    docker exec -it <kratos-container> nc -vz md-delete-mailslurper-1 1025
This should report that the port is open. If not, there is a networking or service issue. 3. Correct SMTP URI Your configuration looks correct for development:
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yaml    courier:      smtp:        connection_uri: <smtp://md-delete-mailslurper-1:1025/?skip_ssl_verify=true>
This matches the recommended setup for using MailSlurper with Kratos in development environments [Kratos Quickstart - Network Architecture](https://www.ory.sh/docs/kratos/quickstart#network-architecture). 4. MailSlurper Logs Your MailSlurper logs show connections are being opened and then closed, but there is no indication that emails are being received. This could mean: - The connection is being established, but the SMTP conversation is not completing. - There is a firewall or security group blocking traffic. - MailSlurper is not healthy or is misconfigured. 5. Kratos Logs The error message in Kratos is:
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"error":{"message":"read tcp ...: i/o timeout"}
This means Kratos is able to connect, but the SMTP server (MailSlurper) is not responding in time. 6. Try Using 
localhost
or Container IP If possible, try using 
localhost
or the direct IP address of the MailSlurper container, if both are running on the same host or network. 7. MailSlurper Health Make sure MailSlurper is not overloaded or stuck. Restarting the MailSlurper container can sometimes resolve transient issues. 8. Check for Port Conflicts Ensure no other service is using port 
1025
on the network. Summary: - Double-check that the hostname 
md-delete-mailslurper-1
is correct and resolvable from the Kratos container. - Ensure MailSlurper is running and listening on port 
1025
. - Use network tools (like 
nc
or 
telnet
) from within the Kratos container to verify connectivity. - Review MailSlurper logs for errors or warnings about SMTP connections. - Restart both containers if needed. If after these steps the issue persists, please provide more details about your Docker Compose or deployment setup, as the knowledge sources do not provide further troubleshooting steps for this specific i/o timeout error with MailSlurper and Kratos. For more on configuring SMTP with Kratos, see [Ory Kratos Email and SMS Guide](https://www.ory.sh/docs/kratos/emails-sms/sending-emails-smtp) and for MailSlurper usage in the quickstart, see [Kratos Quickstart - Network Architecture](https://www.ory.sh/docs/kratos/quickstart#network-architecture).
s
@chilly-king-10285 how to see the direct IP address of the MailSlurper container?
b
A message from kapa.ai
I'm sorry, but the knowledge sources provided do not contain information on how to directly view the IP address of the MailSlurper container. The documentation focuses on configuring and using MailSlurper with Ory Kratos, but does not cover Docker-specific commands or methods for retrieving container IP addresses. If you need this information, you may need to consult Docker's official documentation or use Docker CLI commands outside the scope of the Ory documentation.
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