writes "A lot of small businesses use Google apps to simplify the IT administration and to take adavantage of the excellent web interface. My company is one among them.Right now, we are completely dependent on google for our email. In light of recent Gmail outages, it has become increasingly necessary to have a backup/fallback plan in place. We have around 60 employees and our mail volume is moderate. Setting up an email server is well within our capability. Considering all this, what are our fallback options ?"