Folder email file nameing.
yyyyMMddhhmmss-uid.eml For example: 20051123161710-0000000001.eml
yyyy - 4 symbol year
MM - 2 symbol month. For example: 01,02,...,12
dd - 2 symbol day. For example: 01,02,...,10,11
HH - 2 symbol hour. For example: 01,02,...,23
mm - 2 symbol minute. For example: 01,02,...,59
ss - 2 symbol second. For example: 01,02,...,59
uid - 10 symbol Integer UID. For example: 0000000001,0000000002,...,0000000010, ... .