1. Open your Zimbra account and click ‘New Message’ to compose a new email.
2. You’ll see a ‘New Mail’ dialog box open up. Fill in the necessary details for your email like the recipient’s email address, subject, and your message.
3. Below the subject field, you’ll notice an ‘Attach’ button. Click on it.
4. Another dialog box will open up, prompting you to select the files you want to attach to your email. Use this box to navigate through your files and select the ones you want to attach. You can select multiple files by pressing the ‘Ctrl’ button on your keyboard while clicking on the files you want to attach.
5. Once you’ve selected the files, click the ‘Open’ button. The selected files will be attached to your email.
6. Once you’ve written your email and attached the files you want, click ‘Send’. The recipients of your email will receive the files as attachments.
Also, remember that there might be a size limit for the attachments. The limit would depend on the settings of your specific Zimbra server.