Create and Use Suppression Lists
Create and Use Suppression Lists
Purpose
Suppression lists let you prevent SuperSend from sending to specific email addresses or domains — even if those contacts are added to campaigns. This article explains the difference between suppression and blacklists, how to add to each, and when to use which.
Suppression List vs. Campaign Blacklist
SuperSend has two mechanisms for excluding contacts from sending. They work at different scopes:
Suppression List — team-wide. Contacts on the suppression list are excluded from all campaigns on your team, permanently. Use this for people who have asked not to be contacted, known unsubscribers from other systems, or any contact your team agrees should never receive outreach.
Campaign Blacklist — campaign-level. A blacklist applies only to one specific campaign. Use this for contacts or domains that are irrelevant to a particular campaign but might still be valid targets for others.
Managing the Suppression List
The suppression list is managed at the team level.
- In the left sidebar, click Contacts (or the equivalent team-level contacts section).
- Find the Suppression section or tab.
- Add contacts individually by email address, or bulk-upload a CSV.
Bulk upload:
- Prepare a CSV with a single column:
email. - Upload using the CSV upload option in the suppression list.
Entries on the suppression list are matched by email address. If you add person@company.com to the suppression list, that address is excluded from every send across every campaign on your team going forward.
Managing the Campaign Blacklist
The campaign blacklist is in Campaign Settings → Blacklist tab.
The blacklist table has columns: item (email or domain), type, reason, and actions.
To add a single item:
- Click Add Item.
- Enter an email address (e.g.,
noreply@example.com) or a domain (e.g.,@competitor.com). - Optionally add a reason for your records.
- Save.
To bulk-upload:
- Click Upload CSV or Excel.
- Download the template if needed — the required column is
item. - Fill in email addresses or domains (one per row).
- Upload the file.
To delete:
- Individual items: click the
…menu on any row → Delete. - Bulk delete: select multiple rows using the checkboxes → click "Delete Selected Items" from the dropdown.
Domain blacklisting: Adding a domain (with or without the @) blacklists all email addresses at that domain within that campaign. Useful for competitors, investors, or entire verticals you don't want to contact in a specific campaign.
Auto-Blacklist Settings
In Campaign Settings → Opt Outs tab, you can configure automatic blacklist additions:
Setting | What it does |
|---|---|
Opt Out → Blacklist | When a contact unsubscribes, automatically add them to the campaign blacklist |
Bounced Email → Blacklist | When an email hard bounces, automatically blacklist that address |
Reply Received → Blacklist Domain | When a reply is received, blacklist the contact's company domain (prevents other employees at the same company from receiving this campaign) — excludes consumer providers like Gmail and Yahoo |
The "Reply Received → Blacklist Domain" setting is particularly useful for B2B outbound: once you get a response from someone at a company, you typically don't want to simultaneously contact their colleagues through the same campaign. This setting handles that automatically.
When Suppression Vs. Blacklist
Scenario | Use |
|---|---|
Someone replied "please remove me" | Suppression list — team-wide permanent exclusion |
Existing customer contacts | Suppression list — you'd never want to prospect them |
Competitor employees (for a specific campaign) | Campaign blacklist |
A domain that's irrelevant to a particular campaign | Campaign blacklist |
Contacts who opted out via the unsubscribe link | Handled automatically — opt-outs are added to exclusions automatically |
Expected Result
Contacts you add to the suppression list or campaign blacklist no longer receive sends from the applicable campaigns, even if they're still present in the contact list.
Troubleshooting
- Issue: A suppressed contact is still showing as Active in a campaign.
Fix: Being suppressed means they won't receive sends, but they may still appear in the campaign contacts list with Active status. The suppression check happens at send time, not at the contacts view level. The contact won't actually be sent to.
- Issue: A blacklisted domain is still getting emails.
Fix: Confirm the domain is entered correctly in the blacklist. Domains should be entered as @example.com or example.com without subdomains unless you specifically want to match only a subdomain.
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Updated on: 17/03/2026
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