WillItInbox

Use case

For newsletter senders checking campaigns before send time.

Use WillItInbox to validate lists, test newsletter templates, inspect unsubscribe headers, check content risk, and monitor sender reputation signals.

Bulk sender checklistRun a test

Newsletter checks that matter

Newsletters are exposed to content, link, unsubscribe, reputation, and list-quality problems. Test before the send window, not after complaints arrive.

  • Validate imported or stale subscribers before a campaign.
  • Check List-Unsubscribe, List-Unsubscribe-Post, physical address, and plain-text alternatives.
  • Inspect image-to-text ratio, trigger words, shorteners, HTTP links, and mismatched anchors.

Recommended cadence

Treat deliverability as campaign QA. The bigger or colder the list, the earlier the checks should happen.

Weekly

Validate new imports and suppress confirmed invalid addresses.

Before each send

Run the final template through a deliverability test.

Monthly

Review domain authentication, DMARC, and Postmaster/SNDS signals.