RoundCube not displaying mails with attachments over certain size

Are you experiencing issues with RoundCube not displaying emails that have attachments over a certain size? Don't worry, you're not alone. This article will guide you through the possible causes and solutions for this problem.

RoundCube is a popular webmail client that allows you to access your email accounts through a web browser. However, sometimes it may not display emails with large attachments, leaving you unable to access important files or documents. Let's explore some possible reasons behind this issue and how to fix it.

Possible Causes

There are a few potential causes for RoundCube not displaying emails with attachments over a certain size:

1. Server Configuration: The server hosting your RoundCube installation may have a limit on the maximum attachment size it allows. This limit is usually set by the email server administrator to prevent abuse and ensure optimal performance.
2. PHP Configuration: RoundCube is built using PHP, and PHP also has its own configuration settings that control the maximum file size that can be uploaded. If this limit is set too low, it can prevent large attachments from being displayed.
3. RoundCube Configuration: RoundCube itself has configuration settings that can affect the maximum attachment size it can handle. These settings can be adjusted to allow larger attachments to be displayed.
4. Email Server Configuration: In some cases, the issue may not be with RoundCube itself, but with the email server it is connected to. The email server may have its own limitations on attachment size, which can prevent RoundCube from displaying them.

Solutions

Now that we understand the potential causes of the issue, let's explore some solutions:

1. Contact Your Email Server Administrator

If you suspect that the issue lies with the server hosting your RoundCube installation, reach out to your email server administrator. They will be able to check the server configuration and adjust the maximum attachment size limit if necessary.

2. Adjust PHP Configuration

If the PHP configuration is causing the problem, you can try adjusting the maximum file size setting. However, keep in mind that modifying PHP settings may require administrative access to the server. Here's how you can do it:

1. Locate the php.ini file on your server. This file is responsible for PHP configuration.
2. Open the php.ini file in a text editor.
3. Search for the line that starts with upload_max_filesize. This line controls the maximum file size that can be uploaded.
4. Change the value next to upload_max_filesize to a higher value, such as 20M for a 20MB limit.
5. Save the php.ini file and restart your web server for the changes to take effect.

3. Adjust RoundCube Configuration

RoundCube has its own configuration settings that can be adjusted to allow larger attachments. Here's how you can do it:

1. Access the RoundCube configuration file, usually located in the RoundCube installation directory.
2. Open the configuration file in a text editor.
3. Search for the line that starts with $config['max_message_size']. This line controls the maximum message size that RoundCube can handle.
4. Change the value next to $config['max_message_size'] to a higher value, such as 20M for a 20MB limit.
5. Save the configuration file and refresh your RoundCube interface to apply the changes.

4. Check Email Server Configuration

If none of the above solutions work, it's worth checking the configuration of your email server. Consult the documentation or contact your email server administrator to determine if there are any limitations on attachment size that could be affecting RoundCube.

By following these steps, you should be able to resolve the issue of RoundCube not displaying emails with attachments over a certain size. Remember to always consult with your email server administrator or IT department if you're unsure about making changes to server or PHP configurations.

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