[tlug] Mailing list web archives..... Is this leagal ?

[Tapas Chaturvedi <tapas.chaturvedi@example.com>]

Hi Folks,

Today I was trying to find the solution for one of the issue. While 
googling I found the number of web sites maintaining same Mailing list 
web archives. My question is "Is this legal to maintain web archive of 
different mailing list/group which you are not owning ?" If its not, is 
there any way to do it legally  ?
I am planning to start one archive site for all the famous gnu/Linux 
mailing lists.

Regards,
Tapas