Some answers for Average Email size:
| msgs/box | msgs/day | avg msg size (KB) | box limit (MB) | source | year | based on |
|---|---|---|---|---|---|---|
| - | - | 75 | - | lifewire.com | 2017 | ? |
| - | 122 | - | - | radicati.com | 2015 | research |
| 8K | - | - | - | pando.com | 2013 | research |
| 6K (work), 18K (personal) | - | - | - | article | 2012 | research |