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Deliverability

Unsubscribes, the blacklist and bounce protection

Outsquid protects the people you email and your domain's reputation with three safeguards that are on for every plan.

Unsubscribes

Every campaign email includes an unsubscribe link and a one-click unsubscribe header that Gmail, Outlook and other providers show next to the sender.

When someone unsubscribes:

  • they're stopped in every campaign straight away — not just the one they replied to;
  • their address goes on your blacklist, so no future campaign emails them;
  • they're marked as unsubscribed on their prospect record.

The blacklist

Find it under Settings → Blacklist. You can block:

  • a single email address, or
  • a whole domain — useful for competitors, existing customers, or companies that asked not to be contacted.

Addresses that hard-bounce are added automatically, so they're never tried again.

Blacklisted addresses are skipped when you import prospects and are never emailed by any campaign.

Bounce guard

Bounces — emails rejected because the address doesn't exist — are one of the fastest ways to damage a domain. Outsquid watches each campaign's bounce rate and pauses the campaign if it climbs too high, so a bad list can't keep sending; you get an email when that happens. Clean the list, then resume the campaign.

The bounce guard is on for every new campaign. You can turn it off in a campaign's settings, but we don't recommend it.

Monthly limit

Sending also stops for the rest of the month when your organization reaches its plan's monthly email limit. Upgrade the plan, or sending resumes on the 1st.

Last updated 2026-10-02Still stuck? Contact support