nextcloud / nextcloud/mail

Issues with receiving S/MIME encrypted emails.

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#10,773 16 comments 0 reactions 1 assignee View on GitHub

@kesselb is already working on this.

Since May 12, 2026.

0. to triage bug needs info
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Description

Steps to reproduce

1.When an encrypted email in S/MIME is received, it does not show the option to decrypt and view its content. Instead, it simply says "Not Found".
2.The certificate is correctly imported in the settings section.

Expected behavior

I'm leaving a screenshot that shows how SnappyMail handles it, showing a button to decrypt, enter the key and display the content correctly.

Image
Actual behavior

The option to decrypt does not appear on the email message.

Image
Mail app version

4.2.2

Nextcloud version

30.0.6

Mailserver or service

local IMAP

Operating system

Ubuntu 24.04.2 LTS

PHP engine version

PHP 8.3

Nextcloud memory caching

memcache.local and memcache.distributed

Web server

Apache (supported)

Database

MariaDB

Additional info

No response

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Assessment

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