# Could not connect to SMTP host
**URL:** https://discuss.elastic.co/t/could-not-connect-to-smtp-host/293207
**Category:** Elasticsearch
**Tags:** elastic-stack-alerting
**Created:** [December 30, 2021, 1:35pm UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host/293207 "2021-12-30T13:35:51Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@keyu](https://discuss.elastic.co/u/keyu)
#### Post date: [December 30, 2021, 1:35pm UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host/293207/1 "2021-12-30T13:35:51Z")
Hi,
I have configured watcher related alerts. Sending the watcher alert emails from a "[support.test@domain.com](mailto:support.test@domain.com)". Below is the action template I have used in watcher
```auto
"actions": {
"send_email": {
"email": {
"profile": "standard",
"from": "support.test@domain.com",
"to": [
"test.test2@domain.com"
],
"subject": "Watcher alert email",
"body": {
"text": "{{ctx.payload.filtered}}"
}
}
}
}
```
Initially I am able to see the emails are sent to "[test.test2@domain.com](mailto:test.test2@domain.com)" email. But, don't know the reason why it stopped.
When checked in the **Execution History** tab I able to see the email action is failing with error "Could not connect to SMTP host: dockerhost, port: 10025"
```auto
"actions": [
{
"id": "send_email",
"type": "email",
"status": "failure",
"error": {
"root_cause": [
{
"type": "messaging_exception",
"reason": "failed to send email with subject [Watcher alert email] via account [work]"
}
],
"type": "messaging_exception",
"reason": "failed to send email with subject [Watcher alert email] via account [work]",
"caused_by": {
"type": "messaging_exception",
"reason": "Could not connect to SMTP host: dockerhost, port: 10025, response: -1"
}
}
}
]
}
```
Please let me know how to fix this. Thanks in advance
Regards,
Keyu
---
### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [January 5, 2022, 3:42pm UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host/293207/2 "2022-01-05T15:42:50Z")
See this part in your message
> [@keyu](#):
>
> ```auto
> "reason": "Could not connect to SMTP host: dockerhost, port: 10025, response: -1"
>
> ```
Apparently that host does not exist or cannot be reached over that port.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 2, 2022, 3:43pm UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host/293207/3 "2022-02-02T15:43:12Z")
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