Blocklist

The blocklist ensures that certain email addresses or domains are never added to your contacts — even if someone submits them through a form or the API.

When to use the blocklist

• A contact explicitly asks to never be emailed again
• You want to block role addresses like info@, admin@, or support@
• Compliance requirements mandate permanent suppression (e.g., legal requests)
• Spam trap addresses you've identified

Adding to the blocklist

Go to Contacts → Blocklist and add entries:

• Email address — blocks a specific address (e.g., spam@example.com)
• Domain — blocks all addresses at a domain (e.g., @competitor.com)

How it works

When Sendra tries to create a contact (through import, form submission, API, or manual entry), it checks the blocklist first. If the email matches, the contact is not created.

The blocklist also prevents sending to existing contacts whose addresses match — they're silently skipped during campaign sends.

Blocklist vs unsubscribe