Glossary
Postmaster
The standard mailbox, postmaster@yourdomain, that a mail domain should keep for reporting delivery problems; also the name of providers’ sender dashboards.
ValidReach Team · Updated 2026-10-26
In practice
The mail standard expects every domain that receives mail to have it. Other mail administrators write to it when something goes wrong. Several mailbox providers also publish “postmaster” tools that show your reputation and complaint data.
Verification and sending
Use the provider tools to see how your sending is judged, since verification cannot show that side.