By Default attachment will be stripped in Horde sent Email Box, if you have sent an email with the attachment.
Please refer to the following steps to fix this issue.
- Login to cPanel.
- Go to Email Accounts.
- Login to Horde Webmail email account which sent attachment issue needs to be fixed.
- Click on Settings >> Preference >> Mail.
- Click on Sent Mail.
- Select Save Attachments from Drop-Down and Click on Save Button.
Now, you will be able to find your attachments in sent email as well in Horde.
Looking to integrate CDN with Joomla? Please refer to integrate CDN with Joomla for more details.