# Could not connect to SMTP host: xxx, port: nn, response: 554

**URL:** https://discuss.elastic.co/t/could-not-connect-to-smtp-host-xxx-port-nn-response-554/264761
**Category:** Elasticsearch
**Tags:** elastic-stack-alerting
**Created:** [February 18, 2021, 9:03pm UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host-xxx-port-nn-response-554/264761 "2021-02-18T21:03:49Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![xyz2](https://avatars.discourse-cdn.com/v4/letter/x/e480ec/32.png) [@xyz2](https://discuss.elastic.co/u/xyz2)
#### Post date: [February 18, 2021, 9:03pm UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host-xxx-port-nn-response-554/264761/1 "2021-02-18T21:03:49Z")

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Hi,  
I am getting below error on watcher email alert. Hosts and port are defined in elasticsearch.yml

Could not connect to SMTP host: xxx, port: nn, response: 554"

smtp:  
auth: False  
starttls.enable: False

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<div class="post-metadata">

### Author: ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [February 22, 2021, 12:56am UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host-xxx-port-nn-response-554/264761/2 "2021-02-22T00:56:38Z")

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What do your mail logs show?

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<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 22, 2021, 12:56am UTC](https://discuss.elastic.co/t/could-not-connect-to-smtp-host-xxx-port-nn-response-554/264761/3 "2021-03-22T00:56:39Z")

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