How to Manage your Storage in Thunderbird

Getting Started

This document will show you step by step instructions on how to manage your email client. Deleting, managing, and storing your emails to free up space in your mailbox.

Deleting Old Messages From Your INBOX


Remove any old emails that are in your inbox. Especially look for one's that have large attachments that you have already downloaded to your computer or do not need anymore.

Sent Folder Cleanup


Look through your history of your sent folder and delete any messages that you will not need to return to. If you have a long set of messages with many replies and the last message contains all of the information of the previous messages then you can delete all the messages except for the last one and still keep the information you need.

Junk Email Folder Cleanup


If you have set-up Junk E-mail filtering in Thunderbird, you can find that document on the IT website, you should periodically check those messages that have been moved into their and determine if they are spam. If they are then delete those messages.

Empty Trash Folder

After you have deleted all your old emails you do not need anymore right click on the trash folder and choose “Empty Trash”.


Automatically Delete Old Junk Email

  1. Go to Tools-Account Settings
  2. Choose “Junk Settings” under your email account
  3. Check the box that says "Automatically delete junk mail older than .."
  4. Choose a time period to automatically delete junk mail

Moving Emails to Your Personal Folder

To free up more space you can move any emails you would like to keep into your personal folders. A tutorial on setting up your personal folders can be found on the IT website. To do this you can click on a message and drag it into the folder of your choice.


Configure Thunderbird to Empty Your Trash Folder Upon Exiting

You can configure Thunderbird to automatically delete your trash folder when you close Thunderbird. To do this follow these steps:

  1. Go to Tools-Account Settings
  2. Choose "Server Settings"
  3. Check the box that says "Empty Trash on Exit"


Looking for help?

We offer a number of tutorials and FAQs available in the Guides & FAQs section.

If you have any questions, problems, or comments, please contact the IT Help Desk via email at helpdesk@ucmerced.edu, via phone at 209.228.HELP (4357), or visit them in the Classroom and Office Building room 132A.