sorry if it comes in wrong mail group, but i browsed through most mail groups couldnt find the solution.
did u check the man pages of qmail for concurrencyremote? and archives of qmail mailing list ?
what will be the max mail size, on 56k dialup connection, and concurrencyremote value.
anyways ... Concurrencyremote value by default is set to 20 which u can increase upto 254. Above than this u'll need to recompile qmail with edited src codes ....
I did not get the question right about "max mail size on 56 Kbps dialup connection" ... u can have any size mail if ur 56K dialup is staying online for hrs ... will be able to ans this if u can elaborate ...
ranjeet