We offer a public mirror of tools we find helpful for the design, deployment and operation of Microsoft infrastructure products.

Mailstorm
The Mailstorm tool (mailstrm.exe) is designed to assist in testing the Microsoft Exchange message transfer agent (MTA) or any other message transfer agent accessible by MAPI.

RPC Ping
RPC Ping (RpcPing.exe) is used to troubleshoot connectivity issues to an Exchange Server over the Internet. Full usage instructions are available here.