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Email readiness tool

Email Deliverability Test

Generate a temporary address, send the exact email you want to inspect, and get a practical report on the signals you can improve before sending to customers.

Prepare a private test
What kind of email are you testing?

The address accepts one message for 30 minutes. Webstudiet stores only derived findings for 24 hours; Resend processes and retains the received message under its own policy.

Limit: 3 tests per hour and 5 per day per IP.

Email readiness tool

What the test checks

The report focuses on evidence available in the email received by Resend. It deliberately avoids pretending to know where every mailbox provider will place the message.

01

SPF, DKIM, DMARC, domain alignment, and the published DNS records behind them.

02

Subject, MIME setup, HTML and text alternatives, body size, links, images, and headings.

03

List-Unsubscribe, one-click unsubscribe, and a visible opt-out for marketing messages.

What the score cannot tell you

Inbox placement also depends on sending reputation, recipient engagement, complaint history, list quality, provider-specific filtering, and sending patterns. This first version does not run SpamAssassin, public blocklist checks, or paid reputation services.

Read the guide to SMTP and reliable email delivery