# Email Hostname Certificate Mismatch Causing sidekiq Queue Overload, Severe Site Instability

**URL:** https://meta.discourse.org/t/email-hostname-certificate-mismatch-causing-sidekiq-queue-overload-severe-site-instability/225778
**Category:** Self-hosting
**Created:** [April 30, 2022, 11:02pm UTC](https://meta.discourse.org/t/email-hostname-certificate-mismatch-causing-sidekiq-queue-overload-severe-site-instability/225778 "2022-04-30T23:02:36Z")
**Posts on this page:** 1
**Showing post:** 33

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### Author: ![pratyushmittal](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/pratyushmittal/32/104227_2.png) [@pratyushmittal](https://meta.discourse.org/u/pratyushmittal)
#### Post date: [May 14, 2022, 5:00am UTC](https://meta.discourse.org/t/email-hostname-certificate-mismatch-causing-sidekiq-queue-overload-severe-site-instability/225778/33 "2022-05-14T05:00:15Z")

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> [@Falco](#):
>
> `DISCOURSE_SMTP_OPENSSL_VERIFY_MODE: none`

Hey, I tried it with both the options. It still doesn’t work:

```plaintext
  DISCOURSE_SMTP_ADDRESS: REDACTED
  DISCOURSE_SMTP_PORT: 25
  DISCOURSE_SMTP_USER_NAME: REDACTED
  DISCOURSE_SMTP_PASSWORD: REDACTED
  DISCOURSE_SMTP_ENABLE_START_TLS: false # (optional, default true)
  DISCOURSE_SMTP_OPENSSL_VERIFY_MODE: none
  DISCOURSE_SMTP_AUTHENTICATION: "login"

```

I still get `certificate verify failed (self signed certificate)`.

> [@Emails not working after upgrade: certificate verify failed](https://meta.discourse.org/t/emails-not-working-after-upgrade-certificate-verify-failed/226978/2):
>
> There’s some discussion and advice about a similar error in this recent topic that may be helpful crossed_fingers

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