How to Set Limit to Attachment Size for Roundcube on Plesk Server?

If you are unable to email any attachments, you must change the maximum size for the attachment. Plesk administrators have the ability to impose a memory restriction on the size of attachments for Roundcube Webmail accounts.

To Set Limit to Attachment Size

1. Connect to your Linux server via SSH.

2. Edit the directory /etc/psa-webmail/roundcube/php.ini and enter these settings:

upload_max_filesize = 100M
post_max_size = 100M

3. Open the /usr/share/psa-roundcube/config/config.inc.php file.

$config['max_message_size'] = '133M';

Note: The value you mention here should be 33% higher than the value you set as the limit.

Moving on, these changes should reflect on all domains. It is why you have to modify the templates.

4. Create a new directory for the custom templates for webmail:

# mkdir -p /usr/local/psa/admin/conf/templates/custom/webmail

5. Enter/copy this template to the directory:

# cp /usr/local/psa/admin/conf/templates/default/webmail/roundcube.php
/usr/local/psa/admin/conf/templates/custom/webmail/

6. Edit the FcgidMaxRequestLen directive in the custom template with the value specified in Bytes. (For example: 256MB= 268435456 Bytes)

# sed -i '/FcgidMaxRequestLen/c\FcgidMaxRequestLen 268435456'
/usr/local/psa/admin/conf/templates/custom/webmail/roundcube.php

To finish things off, apply these changes within the template of all webmail accounts.

7. Run the command:

# plesk repair web -server

With this, you can easily set a memory limit to the attachment size for all Webmail accounts for Roundcube.

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