To change the disk space allocated to email storage on a Plesk 5 (UPipe, MDH) domain:
- Log into your Plesk control panel.
- Click on the domain to which you are allocating space.
- Click on the Preferences button.
- In the "Mailbox quota" section, select either "Unlimited" or "Enter Number".
- If you selected "Enter Number" in Step 4, type in the Mailbox quota limit in KB.
- Scroll to the bottom of the page and click on the Update button.