Now, select the Inbox again from the folder list on the left hand side.
There should be a new Size column added to the previous list in the Inbox folder window.
The size of each message indicates how much space it takes up in your inbox. If a message is larger than 10MB its attachment should be saved to your M: drive; then the attachment should be deleted. Directions for this action are available below.
To delete messages from SquirrelMail, select their check boxes and then hit the Delete button followed by the Expunge button.
Next, delete any unwanted messages and move other messages to mailboxes other than "Inbox". These mailboxes are located on your M: drive. Click here for information on moving files in SquirrlMail.
First, open a message with an attachment.
Click the Save to Disk radio button and specify a spot on your M: drive to store the file.
Always make sure you know exactly what you are downloading. Also, be sure to save the item in a place on your M: drive where you will be able to find it later.
It is now safe to delete the message from your inbox.