Broken image in email notifications

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The Basics

  • Nextcloud Server version (e.g., 29.x.x):
    • 32.0.1
  • Operating system and version (e.g., Ubuntu 24.04):
    • Ubuntu 24.04
  • Web server and version (e.g, Apache 2.4.25):
    • Apache2 - whatever Ubuntu installs
  • Reverse proxy and version _(e.g. nginx 1.27.2)
    • Apache2
  • PHP version (e.g, 8.3):
    • 8.3
  • Is this the first time you’ve seen this error? (Yes / No):
    • no
  • When did this problem seem to first start?
    • always I believe
  • Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
    • Bare metal
  • Are you using CloudfIare, mod_security, or similar? (Yes / No)
    • no

Summary of the issue you are facing:

Email notifications are missing an image. See screen shot:

image
image638×284 7.4 KB

I tried using the browser dev console, but couldn’t find the right section of the page to see what was linked. Any ideas how to troubleshoot this?

2

Hi,

This happens when the image used in email templates (usually the logo or header icon) points to a local path or an internal URL that external mail clients can’t reach.

Here’s how to fix it:

  1. In Nextcloud → Settings → Theming, make sure the logo and email logo are both set and accessible via a public HTTPS URL (for example, URL : // yourdomain DOT com/core/img/logo/logo.png).

  2. In config.php, confirm the following entries exist and match your public domain:

    'overwritehost' => 'yourdomain.com',
'overwriteprotocol' => 'https',

    This ensures Nextcloud generates full URLs in emails instead of relative paths.

  3. If you’re using a reverse proxy, make sure it forwards the correct headers:
    Host, X-Forwarded-Proto, and X-Forwarded-For.

  4. After making changes, run occ maintenance:repair and send a test email from Settings → Basic settings → Email server → Send test email.

Once the URLs are correctly generated as absolute links, the images in notification emails will display properly in all mail clients.

3

Thanks! In my case it was just the config.php settings. I didn’t even see email logo, and all of the items in Theming were uploads, not URLs, but it now works with the config changes. I didn’t have to do the maintenance:repair either.

So, THANKS!

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