Default Address in cPanel: handle unmatched mail
Use cPanel Default Address to control what happens when someone emails an address that does not exist on your domain.
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Network Operations
The cPanel Default Address controls what happens to email sent to an address that does not exist on your domain. For example, if sales@example.com does not exist and someone sends mail to it, Default Address decides whether the message is rejected, discarded, or forwarded somewhere else.
Default Address options
| Option | What it does | Recommended? |
|---|---|---|
| Fail with message | Rejects mail to unknown addresses with a delivery failure. | Yes, usually best. |
| Discard | Deletes mail to unknown addresses without delivery. | Use only if you understand the risk. |
| Forward to email address | Creates a catch-all destination for unknown addresses. | Use carefully; it often attracts spam. |
| Pipe to program | Sends mail to a script. | Advanced only. |
Set the default address
- Log in to cPanel.
- Open Email and choose Default Address.
- Select the domain.
- Choose whether to fail, discard, forward, or pipe mail to a program.
- Click Change.
For most domains, UnderHost recommends rejecting unknown addresses with a clear failure message. This tells legitimate senders the address is wrong and avoids silently losing mail.
Catch-all caution
A catch-all forwards mail for every unknown address at your domain. That can sound convenient, but it also means spam sent to random addresses such as abc123@example.com lands in your mailbox.
If a domain receives dictionary-attack spam, a catch-all can fill your mailbox and hosting disk quickly. Use named mailboxes or forwarders for addresses you actually need.
Troubleshooting
- Expected mail is bouncing: create the real mailbox or forwarder instead of relying on Default Address.
- Too much spam is arriving: stop forwarding unknown addresses and set Default Address to fail.
- Mail disappears silently: check whether Default Address is set to discard.
- Only one address should redirect: use Email Forwarders, not a catch-all.
Related: How to create and manage email accounts in cPanel | Email forwarders in cPanel: redirect mail to another address | How to set up email forwarders in cPanel | Not receiving email-why and how to fix it | Why is my email going to spam?
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