Suppression Lists & Compliance
Suppression lists prevent emails from being sent to specific addresses or domains:
Managing Your Blocklist:
1) Go to Settings > Blocklist tab
2) Add entries by type:
• Email suppression — Block a specific email address (e.g., [email protected])
• Domain suppression — Block an entire domain (e.g., competitor.com blocks all @competitor.com addresses)
3) Each entry can have an optional reason for tracking
Three ways to suppress people:
- One at a time — add a single email address or domain from Settings > Blocklist.
- A whole list at once — Settings > Blocklist > Import CSV, upload a file with type,value,reason columns (or simple email / domain columns); WarmySender de-duplicates and validates it, shows a preview, and adds the new entries. Best for a long external list of addresses or domains.
- Straight from your contacts — on the Prospects page, tick the people you want (or 'Select all' to grab a whole filtered segment) and choose the 'Suppress' bulk action. They're added to the blocklist and skipped by every campaign right away. Fastest when the people are already in your account. See 'Managing Prospects & Contacts' for the full steps.
Automatic Suppression:
- Bounced emails are auto-added (source: 'bounce')
- Unsubscribed prospects are auto-added (source: 'unsubscribe')
- Spam complaints are auto-added (source: 'complaint')
- Manual entries show source: 'manual'
Enforcement:
- During CSV import: any email matching a suppression entry is automatically skipped and counted as 'suppressed'
- During campaign sending: suppressed prospects are blocked from receiving emails
- Domain-level suppression matches all emails at that domain
- Case-insensitive matching
CAN-SPAM Compliance:
- Every campaign email includes an unsubscribe link in the footer
- RFC-compliant List-Unsubscribe and List-Unsubscribe-Post headers
- Unsubscribe requests are processed immediately
- Physical address should be included in your email footer
GDPR Compliance:
- Respect opt-out requests promptly
- Maintain your suppression list as your 'do not contact' registry
- Consider adding a privacy policy link to your email footer
- Data access and deletion requests should be handled through your workspace settings
Best Practice: Regularly review and clean your suppression list. Add competitor domains, existing customer domains, and known bad addresses proactively.