Managing Email Quotas

Email quotas define the maximum amount of storage space each email account can use. Properly managing quotas ensures your email service runs smoothly, prevents bounce-backs, and helps allocate storage efficiently across all accounts.

Understanding Email Quotas

An email quota is the storage limit assigned to an individual email account. When an account reaches its quota:

• New incoming emails are bounced back to the sender
• The account holder may not be able to send emails
• Webmail access may become slow or unresponsive

Your hosting plan has a total disk space allocation that is shared between websites, databases, and email accounts. Email quotas help ensure one account does not consume all available space.

Managing Quotas in cPanel

Viewing Current Quotas

1. Log in to cPanel
2. Navigate to Email > Email Accounts
3. Each account shows its current Disk Used and Disk Quota

Increasing a Quota

1. Go to Email > Email Accounts
2. Click Manage next to the account you want to modify
3. In the Allocated Storage section, enter the new quota value (in MB)
4. Click Update Email Settings

Common quota sizes:

• 250 MB — Light email users (mostly text emails)
• 500 MB — Average users
• 1000 MB (1 GB) — Heavy email users with attachments
• 2000 MB (2 GB) — Power users or shared mailboxes
• Unlimited — Use with caution; constrained by total disk space

Tip: Setting quotas to "Unlimited" means the account is limited only by the hosting plan's total disk space. This can be risky as one account could fill up all available space.

Decreasing a Quota

1. Follow the same steps as increasing
2. Enter a smaller quota value
3. If the account currently uses more than the new quota, the user must delete emails first
4. The system will warn you if the new quota is less than current usage

Managing Quotas in DirectAdmin

For Administrators

1. Log in to DirectAdmin
2. Navigate to E-Mail Manager > E-Mail Accounts
3. Click the account name to edit
4. Modify the Email Quota field
5. Click Modify

For Resellers

1. Navigate to Account Manager > Manage User Packages
2. Edit the package to set default email quotas
3. New accounts created with this package will use these defaults

Per-Account Management Best Practices

1. Set Reasonable Default Quotas

When creating hosting packages, set email quotas that make sense:

• Basic hosting: 250 MB per mailbox, 5-10 mailboxes
• Business hosting: 500 MB - 1 GB per mailbox, 25-50 mailboxes
• Enterprise: 2 GB+ per mailbox, unlimited mailboxes

2. Monitor Usage Regularly

Check email disk usage monthly:

1. In cPanel: Email > Email Disk Usage
2. Identify accounts consistently above 80% quota
3. Proactively increase quotas or contact users about cleanup

3. Implement Quota Warnings

Set up email notifications when accounts approach their limit:

• Configure alerts at 80% usage (warning)
• Configure alerts at 90% usage (critical)
• Users can take action before they start losing emails

Cleanup Tips for End Users

Share these tips with email users who are running low on space:

1. Empty the Trash folder — deleted emails still count against quota until the Trash is emptied
2. Clear the Spam/Junk folder — spam accumulates quickly
3. Delete old emails with large attachments — sort by size to find the biggest offenders
4. Archive emails locally — use an email client to download old emails to your computer
5. Unsubscribe from newsletters — reduce incoming clutter
6. Use cloud links instead of attachments — share files via Google Drive, OneDrive, or Dropbox

Tip: An email with a 5 MB attachment stored in both Inbox and Sent folders uses 10 MB of quota. Encourage users to avoid unnecessarily large attachments.

Calculating Required Storage

To estimate how much email storage a user needs:

• Average text email: 10-50 KB
• Email with small attachment: 1-5 MB
• Email with photos: 5-25 MB
• 100 emails per day (mostly text): ~100 MB per month
• 50 emails per day with attachments: ~500 MB per month

Troubleshooting

User Cannot Receive Emails Despite Quota Available

• Check if the overall hosting account disk space is full
• Email quota is separate from hosting disk quota — both must have available space
• Verify the email account is not suspended

Quota Shows More Usage Than Expected

• Check all folders including Drafts, Sent, and Trash
• Look for hidden folders (.Junk, .Spam, .Archive)
• Some email clients create duplicate copies in multiple folders

Cannot Reduce Quota Below Current Usage

• The user must delete emails to bring usage below the new quota
• Provide them with cleanup tips above
• As an admin, you can delete emails from specific folders via cPanel or shell access

Related Articles

• Checking Email Storage
• Setting Up Email Accounts
• Email Troubleshooting

Need help managing email quotas? Contact our support team at {{SUPPORT_EMAIL}} or open a ticket at {{SUPPORT_URL}}.