Postfix message_size_limit

[vpx]

In the Postfix plugin the default value is 51200000 Bytes.

I know it follows the convention of the original documentation.

message_size_limit
(I linked via Wayback Machine as I don't know why the Postfix site is currently offline)

But does anybody know why that is?

I mean it is calculated as 50x1024x1000 = 51200000 Bytes.

Shouldn't it either be 50x1024x1024 = 52.428.800 Bytes or 50x1000x1000 = 50.000.000 Bytes?

I know the diference between KiB and KB, MiB and MB etc. but why is it a mixed case here?

[Patrick M. Hausen]

I read that as 512 x 100.000. One power of two, one power of ten.