Inbox placement testing: what seed tests can and cannot prove
Seed tests are useful diagnostics, but they do not replace reputation, engagement, and real recipient behavior.
Inbox placementSeed testsDeliverability
What seed tests can prove
- A specific campaign reached or missed configured seed inboxes.
- The message landed in inbox, spam, promotions, updates, delayed, or missing buckets for those seeds.
- A template, link, authentication change, or ESP change shifted observed placement in a controlled test.
What seed tests cannot prove
- They cannot prove placement for every real subscriber.
- They do not create positive engagement or warm up a domain.
- They do not replace Google Postmaster Tools, Microsoft SNDS, bounce data, complaints, and engagement trends.
Best use
Use seed tests as campaign QA and change detection. Pair them with technical reports and reputation dashboards such as the existing Google Postmaster Tools walkthrough.
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