Roundcube is a webmail client it doesn't handle receiving email. I'd suggest contacting your hosting provider to see if they can track why the email is getting dropped by the email server.

Hi,

I am having trouble receiving the account verification email from pCloud to my work email ([email protected]).

pCloud support checked their logs and confirmed the email status is "Sent (250 OK)," meaning my server accepted it. However:

The email is not in my Inbox or Spam folder.

It does not show up in my cPanel Track Delivery logs at all.

I can receive manual emails from their support team, but not the automated one.

I have already tried adding the sender to my whitelist and checked my filters, but nothing works. Since the sender sees a "250 OK" but I see nothing in my logs, where could the email be getting blocked?

Thanks for any help

Is there any errors either in the Roundcube log <RC directory>/logs/errors or in the browsers JS console?

Hey
I've been using Roundcube to send high-res photos of my 50p and £2 pieces to some fellow collectors for valuation. Usually it works fine but I've noticed a weird lag lately where the thumbnails don't generate or the upload just hangs halfway. My storage quota says I have space left but the behavior says otherwise especially with these larger image files. I've tried resizing them and clearing my cache without much success. I'm definitely not a server expert so maybe I missed a simple setting in the interface. Any of you had similar issues when dealing with lots of attachments?

Just gotta say, Roundcube on Debian Trixie is excellent. It's functional, fast, and honestly even smoother and easier than some desktop mail clients for certain workflows. You guys have done an amazing job keeping it so solid. Huge congratulations to the whole team – and really hope this beauty gets maintained for a long, long time.

I have just turned on API button in Mailvelop and Roundcube on Debian recognized it.

Thanks for the addition! I'll add it to my next 1.7 install.

Quote from: SKaero on March 27, 2026, 01:02:57 AMa way to switch to light / default mode in case there is a message that needs to be view in the original form.

I have added a button to the message viewer toolbar, that can toggle to and from light mode. It is only there when the RCM application is in dark mode.

Use the "ROUNDCUBEMAIL_COMPOSER_PLUGINS" environment variable as described here https://github.com/roundcube/roundcubemail-docker/blob/master/README.md

Hi everyone,
i've set up roundcubemail using a Docker Composer file.

  roundcubemail:
    container_name: roundcubemail
    image: roundcube/roundcubemail:nightly
    restart: unless-stopped
    ports:
    - '8084:80'
    environment:
      # Database Variables
      ROUNDCUBEMAIL_DB_TYPE: 'pgsql'
      ROUNDCUBEMAIL_DB_HOST: '192.168.20.60'
      ROUNDCUBEMAIL_DB_NAME: 'roundcubemaildb'
      ROUNDCUBEMAIL_DB_USER: 'roundcubemaildbuser'
      ROUNDCUBEMAIL_DB_PASSWORD: '###################'
      # Mail Variables
      ROUNDCUBEMAIL_DEFAULT_HOST: 'ssl://dsme01.intern.example.com'
      ROUNDCUBEMAIL_DEFAULT_PORT: '993'
      ROUNDCUBEMAIL_SMTP_SERVER: 'ssl://dsme01.intern.example.com'
      ROUNDCUBEMAIL_SMTP_PORT: '465'
      ROUNDCUBEMAIL_USERNAME_DOMAIN: 'example.com'
      ROUNDCUBEMAIL_PLUGINS: 'debug_logger,new_user_identity,password'
      ROUNDCUBEMAIL_INSTALL_PLUGINS: 'true'
      ROUNDCUBEMAIL_SKIN: 'elastic'
    volumes:
      - /var/lib/docker/volumes/roundcubemail/_data:/var/www/html/config
      - /etc/ssl/certs:/etc/ssl/certs
Afterwards, I installed four plugins, including their dependencies, on the container's console.

- roundcube/carddav
- kolab/libkolab
- kolab/libcalendaring
- kolab/calendar
Now I'm having a problem: when I rebuild, the four plugins I installed via the console aren't being built. How can I add them to my Docker Composer file?

So that all plugins are automatically installed when rebuilding?

Regards, Stefan Harbich