Update 11/14/13: We believe that we have resolved all of the related issues; if you still see problems with Remote Connectivity Analyzer, please send us feedback.
We’re having some technical issues with the Remote Connectivity Analyzer site, which is causing occasional errors when running tests. Although we continue to monitor, please send us feedback using the tool if you're impacted. While we can’t respond to each inquiry, this helps us measure the impact. Sorry for the inconvenience; we're working hard to mitigate it!
For status updates, you can follow us on Twitter @ExRCA
RCA Team
Updated Jul 01, 2019
Version 2.0The_Exchange_Team
Microsoft
Joined April 19, 2019
Exchange Team Blog
You Had Me at EHLO.