Deliverability notes

Practical writing on inbox placement, authentication, seed testing, and campaign diagnostics.

July 2026

Why inbox placement is not the same as delivery

A delivered email can still land in spam, promotions, or another filtered folder. Inbox placement testing shows what happens after the receiving server accepts the message.

Most senders watch delivery rate and assume a successful send means a successful campaign. The harder truth is that mailbox providers make a second decision after accepting the email: where should it appear for the recipient? Seed testing helps teams measure that final placement across providers before scaling a campaign.

July 2026

The quiet power of SPF, DKIM, and DMARC alignment

Authentication is not just a DNS checklist. Alignment tells mailbox providers whether the visible sender and technical sender belong together.

SPF verifies authorized sending servers. DKIM verifies signed content. DMARC connects those checks back to the visible From domain. When alignment is weak, a campaign can look suspicious even if one underlying record appears to pass. Strong alignment gives providers a cleaner trust signal.

July 2026

How to read a seed test without overreacting

One bad result does not always mean a campaign is broken. The pattern across providers, folders, and authentication evidence matters more.

A useful seed test separates one-off mailbox behavior from repeatable deliverability risk. Look first at provider clusters, then authentication, content issues, blocklists, and recent sending changes. A good report should point to the likely cause, not just display percentages.