# How to modify Smtp configuration, sending fails causing a constant freeze

**URL:** https://meta.discourse.org/t/smtp/396569
**Category:** Self-hosting
**Tags:** email
**Created:** [February 20, 2026, 4:23am UTC](https://meta.discourse.org/t/smtp/396569 "2026-02-20T04:23:31Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![pfaffman](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/pfaffman/32/120154_2.png) [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [February 20, 2026, 1:47pm UTC](https://meta.discourse.org/t/smtp/396569/2 "2026-02-20T13:47:24Z")

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Your mail server doesn’t have a valid certificate for the hostname your using to access it.

See also [Troubleshooting Outgoing Email](https://meta.discourse.org/t/troubleshooting-outgoing-email/271484)

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