Deliverability
Test the message or validate the mailbox.
Use the switch below to choose the workflow: send a real email to a WillItInbox inbox, or verify recipient addresses before you send.
Two different deliverability questions
A message can be technically safe while the recipient address is risky, and a valid mailbox can still receive a message that fails authentication, link, content, or sender reputation checks. This page keeps those workflows together so teams can test the email they plan to send and validate the audience they plan to send it to.
Choose a tool
Deliverability workbench
Deliverability tester
Generate an inbox, send any real email to it, and get the same evidence a receiving mailbox sees: authentication, infrastructure, headers, SpamAssassin, content, links, and a prioritized fix list.
Generate a unique inbox for each test
Receive a real email from your app or ESP
Analyze SPF, DKIM, DMARC, BIMI, PTR, TLS, headers, content, and links
Open a live report with a 0-100 score and prioritized fixes