PenTeleData maintains its mail servers 24 hours a day, 7 days a week, 365 days a year, and attempts to maintain 100% uptime and 100% delivery rates; however, on occasion due to circumstances beyond our control, service is affected. Service, authentication, and delivery times are not guaranteed. As such, the PenTeleData email servers are not meant for large-scale commercial deployments (due to the large numbers of viruses and spam messages that are processed daily). Commercial customers that require customized mail services should contact the Commercial Sales Department.