Abstract: Systems and methods directed to facilitating client to business interactions and transactions are described in this application. Some embodiments include a platform server, a code-presenting apparatus, a point of sale system, an associate device, and a patron-controlled device. When, for example, a patron sits down in a restaurant, they will be able to scan a code from the code presenting device. Once the code is scanned, that patron's device will be able to place orders that the restaurant can fulfill, thereby eliminating a need for dedicated hardware that can quickly become a health hazard if not properly cleaned. In some embodiments, it is contemplated that the associate device can be omitted from the system, and it is further contemplated that, in embodiments with an associate device (e.g., a mobile device that a server can use to take orders), the associate device can double as the code-presenting apparatus.

Abstract: In some embodiments, a mail verification server can use probabilistic methods to determine whether a user's emails should be throttled based on the recipients to which the user sends emails. The mail verification server can estimate a number of unique recipients to which a user has sent emails in the past, and can estimate whether the rate of which the number of unique recipients increases crosses over a predetermined threshold. The mail verification server can determine that a new user has sent emails to 500 unique recipients, and can track the rate at which the number of unique recipients rises. The mail verification server can then throttle the user's emails if the rate at which the number of unique recipients rises exceeds threshold (e.g., if the number of unique recipients the user has contacted rises by 200% and/or a similar threshold).