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When an email to a contact results in a hard bounce or a complaint, Loops suppresses sending email to the contact to protect your sending reputation. Attempted sends to this contact will appear as hard bounces. Suppressed contacts won’t receive further emails sent via Loops. In order for a contact to receive emails again, you need to remove the suppression.
You should typically only remove suppression if you’re confident the address is now deliverable (for example, the mailbox was restored).

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Check if a contact is suppressed

You can use the Check suppression endpoint to check if a contact is suppressed and to view your current suppression removal quota. 
GET https://app.loops.so/api/v1/contacts/suppression?email=test@example.com

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Remove suppression for a contact

Free Loops accounts can only request suppression removal via our support channels.
Paid accounts can use the Remove suppression endpoint to remove a suppression. 
DELETE https://app.loops.so/api/v1/contacts/suppression?email=test@example.com

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Suppression removal quota

Paid accounts can request up to 100 suppression removals in a rolling 30 day period. You can view your current suppression removal quota by using the Check suppression endpoint.
Last modified on March 25, 2026