Fluctuations in email size modeled using a gamma-like distribution

A previously established frequency distribution model, which integrates a lognormal distribution with a logarithmic equation, effectively characterizes fluctuations in email size during sending requests. In addition, an email size generation model has been developed based on this log-normal-like framework. While the fitting of these models has been deemed satisfactory, they can be further enhanced in the range of small email sizes. This study advances these models by incorporating a gamma distribution alongside a logarithmic equation. The resulting gamma-like model demonstrates a significantly improved fit compared with the log-normal-like model. These results contribute to the knowledge on the statistical properties of sending mail.