I'm looking for a web-based solution for employee notifications. It needs to contact ~125 employees via e-mail and receive back and track confirmations (more than one e-mail per employee would be better. It would be additionally useful (if after a period of non-response) it could start sms/calling people until they responded back.
This is needed for a 24 hour operation where accountability is required.
Seems like this could be accomplished in conjunction with gmail/google voice.