Configuring per-address relay settings

Relay lets you configure filtering settings per protected address. This means your public-facing info@ address can have aggressive spam filtering while your internal admin@ address stays more lenient — all on the same domain.

Accessing per-address settings

1. Navigate to Domains in the sidebar
2. Click on the domain with Relay enabled
3. Go to the Relay tab
4. Click on the address you want to configure

Spam threshold per address

Each relay address has its own spam threshold — the score at which incoming messages are quarantined instead of delivered.

Address type	Suggested threshold	Reasoning
info@, contact@, hello@	3–4	Public addresses receive the most spam. Be aggressive.
support@, sales@	5–6	Customer-facing but more targeted. Balanced filtering.
admin@, ceo@	7–8	Internal addresses. Missing a legitimate email is worse than letting some spam through.
Catch-all / fallback	3–4	Catch-all addresses attract the most random spam. Filter aggressively.

To change the threshold, click on the address, adjust the slider or enter a value, and save.

Adding and removing addresses

Adding a new address

1. On the Relay tab, click "Add address"
2. Enter the local part (the part before @) — the domain is already selected
3. Set the initial spam threshold
4. Click "Save"

The new address is protected immediately. Incoming email will be filtered through Cleanbox before reaching your mail server.

Removing an address

Click on the address and select "Remove". After removal:

• Email to this address is no longer filtered by Cleanbox
• Messages go directly to your mail server via the MX relay (unfiltered)
• The address still works — it just loses Cleanbox protection

Account limits

The number of relay addresses you can protect per domain depends on your plan:

Plan	Relay accounts per domain
Advanced	5
Enterprise	Unlimited

If you need to protect more addresses than your plan allows, consider upgrading or prioritizing your most exposed addresses (typically public-facing ones like info@ and support@).

Monitoring relay activity

All filtered messages — delivered, quarantined, denied, or rejected — appear in your Cleanbox message history just like alias messages. You can filter the message view by address to see relay-specific activity.

For each message, the full spam report is available showing:

• Total spam score
• Individual rules that triggered
• IP blacklist results
• Authentication checks (SPF, DKIM, DMARC)

Use this data to fine-tune your per-address thresholds over time. If a specific address receives many false positives, raise its threshold. If spam is getting through, lower it.

Combining Relay with other features

Relay addresses benefit from the same Cleanbox features as aliases:

• Contact rules — Whitelist, block, or mute senders for specific relay addresses
• Filters — Create filter rules that apply to relay-protected addresses
• Quarantine — Review and release messages that were flagged as spam
• Analytics — Track email volume and spam rates per address on your dashboard

The only feature not available on relay addresses is Shield (rate limiter, snoozer, gatekeeper) — Shield is designed specifically for aliases.