What is a seed (inbox placement) test? A Clear Guide

A seed test sends to test inboxes across providers to measure whether you land in the inbox or spam before a real campaign.

Why it matters

Knowing a seed (inbox placement) test helps you land in the inbox. See the deliverability checklist.

How Rainmail helps

Rainmail sends from your own domain on a dedicated, isolated IP with SPF, DKIM, DMARC, reverse-DNS and managed warm-up handled for you, plus a REST API and an AI watching deliverability — and it welcomes senders SES, SendGrid and Mailchimp reject, from $8. Run the free checker or see plans.