1. Make sure you restart Apache after you made the change to the php.ini file.
2. Create a file (example info.php) in the Roundcube folder with the following:
<?php
phpinfo();
Then go to that file and search for "upload_max_filesize" and "post_max_size" to see what the setting actual is. The config files that are used to get to those settings are shown at the top of the page.

I have Roundcube 1.6.5 running on Gentoo Linux.  I'm using Apache 2.4.63 and php-8.2.28. When I try to upload a file >2MB, I get "The uploaded file exceeds the maximum size of 2.0 MB." and it refuses to load. My /etc/php/apache2-php8.2/php.ini contains the following lines:

upload_max_filesize = 64M
post_max_size = 64M

Every post that I have read have said that I need these two lines set to the max upload size, but I still get this error message.

Any clues?

We just published security updates to the 1.6 and 1.5 LTS versions of Roundcube Webmail. They both contain a fix for recently reported security vulnerability.

Security fixes
Fix Post-Auth RCE via PHP Object Deserialization reported by firs0v.
See the full changelogs in the release notes on the Github download pages for the updated versions 1.6.11 and 1.5.10.

We strongly recommend to update all productive installations of Roundcube 1.6.x and 1.5.x with this new versions.

Source: https://roundcube.net/news/2025/06/01/security-updates-1.6.11-and-1.5.10
Get it Now: https://roundcube.net/download

currently inbox is visual mess. It would be great if one could set every second row in different (definable) color.

Hi there, i have a mailu Server and want to use Roundcube with it. The Mailu server runs with a DNS resolver outside the Docker structure and can seems to run fine. But when I log in to Roundcube and want to send an email, I get an error message: SMTP ERROR, Sender cannot be set. So i search the logs of the smtp and find this: warning: connect to Milter service inet:antispam:11332: Connection refused

I have just been automatically changed to the new updated layout, last night.
I hate it.
I do not what my list on the left and the viewing pane open on the right, and permanently.
I always removed the viewing pane, as it is a distraction and takes up too much space on my screen, i prefer just a list only.
Will the option to select the views be brought back, so I can get ride of the very annoying right hand open pane of the emails? Or is there another way to select this, as in previous versions?

Roundcube Webmail 1.6.9

Ist es möglich die Hintergrundfarbe der Login-Seite zu ändern?

Thank you, both.

I know the gmail's password was changed, but will double check, just in case. I'll also contact the mail provider!

When I print from webmail roundcube the font size is toooooo small and if I delete margin or make the % of view bigger the text is truncated...

Very well, thanks so much for explanation. I was looking exactly a confirm like that.