How does seedlist testing work?

Seedlist testing follows a straightforward process:

Build or obtain seed addresses: Accounts at major providers configured for testing.

Include seeds in your send: Add seed addresses to your campaign recipient list.

Execute the send: Send your campaign as normal.

Check seed mailboxes: Programmatically or manually verify where each message landed.

Compile results: Calculate inbox rate, spam rate, and missing rate per provider.

Automated tools handle steps 4 and 5 at scale. Manual testing works for small, occasional checks.

Deploy test ships alongside your fleet and track which dock each one receives.