We are an exchange 2007 shop but use a different SMTP gateway in our DMZ (Mail Marshal brand software).
Presently, we use a home-grown solution to monitor that everything is up:
Every 10 minutes, we send an email. It is received by 'Mail Marshal' and forwarded to the exchange account mailbox, which does an auto-reply back to the sender.
Basically, if we send a message, but we don't get a reply, that's a problem.
Generally, it works pretty well but I'd like to use a professional service that doesn't reply on there being power in our computer room, and our mobile broadband internet service on that pc being up.
What's the best email monitoring solution which will test OUR COMPLETE ENVIRONMENT: e.g. our smtp gateway in the DMZ and our exhange servers?
At a minimum, we would want SMS notices going to cell phones, but it would be nice if it could call people as well.
Though we do extensive monitoring with what's-up-gold , if our T1 lines are down (which is what happened last night), none of those monitors are effective.