Suppression & bounces
Bounces and complaints are handled for you automatically, before they can damage your sending reputation. How Irisend's suppression and bounce handling works.
- A hard bounce or a spam complaint adds that recipient to your team's suppression list. Before every send, Irisend drops any suppressed address from
to,cc, andbcc— if every recipient on an email is suppressed, it's markedemail.suppressedand never reaches the provider. - Manage the list from the API (see Suppressions) or by hand from the dashboard's Suppressions page — add an address before you ever send to it, or remove one that bounced by mistake.
- Stay under the thresholds mailbox providers actually enforce: hard bounce rate under 5% (throttling risk above 10%), spam complaint rate under 0.1% (throttling/suspension risk at or above 0.3% — this is Gmail and Yahoo's bulk-sender bar, not just ours). Full policy in the Acceptable Use Policy.
- One-click unsubscribe (
List-Unsubscribe, RFC 8058) is added automatically on every broadcast send — direct transactional sends don't get it unless you set the header yourself (Gmail and Yahoo's one-click requirement applies to bulk mail, not one-off transactional email).