“I am happy to recommend Nirix to my clients as it is far more affordable than running an in-house exchange server and competitive in pricing with other online hosted exchange solutions.
The differentiator is that Nirix is located in Canada and there are actual people you can call for support. I have found the service to be extremely reliable, in fact I cannot recall if there ever has been an outage.
The anti-spam is excellent and setting up mobile phones is a breeze. Having run Exchange servers for 15 years prior to moving to Nirix, I can say that without a doubt it has freed up at least 4 hours per week not having to patch/update the server or troubleshoot spam issues (this is for an organization of 50 staff + 1 IT Technician). Also, not having to tell staff that e-mail will be unavailable from X-Y a few times a month for updates is liberating.”