Changing an email account’s quota
You can change the size limit on any of your email accounts whenever required.
To change an email account’s quota:
Click on the Add / Remove accounts link in the Mail Menu area.
Click on the button next to the required email address.
Enter the new quota in the New Quota field. You can remove a quota limit from the email account by erasing all information in the field or entering the word unlimited.
Click on the button.
Your quota has now been changed for that account.