# Let’s Encrypt will revoke some SSL certificates on March 4, 2020

**URL:** <https://discourse.mailinabox.email/t/let-s-encrypt-will-revoke-some-ssl-certificates-on-march-4-2020/6151>\
**Category:** Announcements\
**Created:** [March 3, 2020, 10:35pm UTC](https://discourse.mailinabox.email/t/let-s-encrypt-will-revoke-some-ssl-certificates-on-march-4-2020/6151 "2020-03-03T22:35:02Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![alento](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/alento/32/1371_2.png) [@alento](https://discourse.mailinabox.email/u/alento)\
**Post date:** [March 3, 2020, 10:35pm UTC](https://discourse.mailinabox.email/t/let-s-encrypt-will-revoke-some-ssl-certificates-on-march-4-2020/6151/1 "2020-03-03T22:35:02Z")

</div>

In 90 minutes from now Let’s Encrypt will begin to revoke approximately 2.6% of the SSL certificates that they have issued due to a issuance error.

This will affect a small number of Mail-in-a-Box instances.

To check if your SSL certificate is impacted, please visit the following website:

[https://checkhost.unboundtest.com/](https://checkhost.unboundtest.com/)

If that website is not responding or otherwise not available, run the following on the command line.

```
curl -XPOST -d 'fqdn=sub.mydomain.tld' https://checkhost.unboundtest.com/checkhost

```

Replace `sub.mydomain.tld` with the FQDN of your MiaB installation.

This will advise you if your certificate is impacted. If your certificate is revoked you will need to issue a new certificate manually. Please check back here for instructions on how to do so.

---

<div class="post-metadata">

**Author:** ![openletter](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/o/f1d935/32.png) [@openletter](https://discourse.mailinabox.email/u/openletter)\
**Post date:** [March 3, 2020, 10:49pm UTC](https://discourse.mailinabox.email/t/let-s-encrypt-will-revoke-some-ssl-certificates-on-march-4-2020/6151/2 "2020-03-03T22:49:43Z")

</div>

> [@alento](#):
>
> `curl -XPOST -d 'fqdn=sub.mydomain.tld' https://checkhost.unboundtest.com/checkhost`

For code that is longer than one line, it is better to add 4 spaces before the code:

```
curl -XPOST -d 'fqdn=sub.mydomain.tld' https://checkhost.unboundtest.com/checkhost

```

---

<div class="post-metadata">

**Author:** ![JoshData](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/joshdata/32/2153_2.png) [@JoshData](https://discourse.mailinabox.email/u/JoshData)\
**Post date:** [March 3, 2020, 10:52pm UTC](https://discourse.mailinabox.email/t/let-s-encrypt-will-revoke-some-ssl-certificates-on-march-4-2020/6151/3 "2020-03-03T22:52:31Z")

</div>



---

<div class="post-metadata">

**Author:** ![alento](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/alento/32/1371_2.png) [@alento](https://discourse.mailinabox.email/u/alento)\
**Post date:** [March 4, 2020, 3:33pm UTC](https://discourse.mailinabox.email/t/let-s-encrypt-will-revoke-some-ssl-certificates-on-march-4-2020/6151/4 "2020-03-04T15:33:43Z")

</div>

> **[Revoking certain certificates on March 4](https://community.letsencrypt.org/t/revoking-certain-certificates-on-march-4/114864/129?u=alento)**
>
> In order to complete revocations before the deadline of 2020-03-05 03:00 UTC, we are planning to start revoking affected certificates at 2020-03-04 20:00 UTC (3:00pm US EST). Please continue to renew and replace affected certificates in the...

Rather than following the link - the key info is here:

 ![image](https://discourse.mailinabox.email/uploads/default/original/2X/8/847a4e4783539cc5e8ab1edc5265882257cf181b.png)

---

<div class="post-metadata">

**Author:** ![system](https://discourse.mailinabox.email/uploads/default/original/2X/4/4d0933d13c456b7e57f296aa6cc344525b6f0c70.png) [@system](https://discourse.mailinabox.email/u/system)\
**Post date:** [March 10, 2020, 3:33pm UTC](https://discourse.mailinabox.email/t/let-s-encrypt-will-revoke-some-ssl-certificates-on-march-4-2020/6151/5 "2020-03-10T15:33:46Z")

</div>

This topic was automatically closed 6 days after the last reply. New replies are no longer allowed.