Download Microsoft Exchange Server SMTPDiag Tool from Official Microsoft Download Center

A Surface Pro, a Surface Pen, a Surface Arc Mouse

Surface Pro

Ultra-light and versatile

Microsoft Exchange Server SMTPDiag Tool

Important! Selecting a language below will dynamically change the complete page content to that language.

Select Language:
SmtpDiag is a troubleshooting tool designed to work directly on a Windows server with IIS/SMTP service enabled or with Exchange Server installed.