01
Every send checks the suppression list before a destination is attempted. A suppressed recipient terminates with a suppressed trace event instead of reaching the provider.
02
Add, remove, and look up entries via REST, MCP tools, or the dashboard. Bulk import handles the list you bring from your previous provider.
03
The list belongs to your account, not to a provider. Migrate from SES to Postmark and nothing needs re-importing.
04
Suppression management is not a paid add-on. Free, Basic, Pro, and Enterprise all get the same list and the same enforcement.
One HTTP call to get started