For Outlook to perform efficiently, it is important to keep up with your email and archive regularly. If your mail file gets too large, you’ll start to experience problems. Often, the only solution is to reduce the size of your mailbox. If you don’t clean up or archive, and the mail file keeps getting larger, you will see random problems with your Outlook, and sometimes your whole computer.
We recommend that you keep your mailbox to around 500MB. Once it gets to around 1GB, you may start to see some slowness in your email. If it goes over 2GB, you’ll probably experience crashes in Outlook, and other random issues.
It’s very easy to check the size of your mailbox by following these few steps (steps are based on Outlook 2007 and may differ slightly for older versions):
- In Outlook, go to select Folder List from the Go menu at the top.
- On the left side of the Outlook window, scroll all the way to the bottom of the folder list.
- Click once on “Folder Sizes”.
- It may take a minute, but Outlook will calculate your total mailbox size, and the size of each folder.
If “Total Size (including subfolders):” is bigger than 500,000 KB, you should be aware that your mailbox is getting large. Scrolling down through the list will show you the size of individual folders. These numbers may help you see if a certain folder seems large or is something that can be archived.
Probably the best way to avoid problems is to set a reminder once a month to clean out old mail. Make sure your Deleted Items folder is empty, and clean out your Spam\Quarantine folder. At this time you can also archive any folders or email that is no longer needed in your active mail file. We have a How To that will help you create, move, or open an archive. You can find it here: http://it.cas.psu.edu/273.htm