[Dx4win] How much QSL manager data is useful?

[RWMaylott at aol.com]

One thing that's not easy to determine is how much of this QSL manager data  
is STILL valid.  As a QSL Bureau manager, we get a lot of  QSLs directed to 
managers that haven't handled a certain callsign for  years.  Many DX stations 
decide to handle their own QSLs, or some managers  have to give it up due to 
inability to get up log info from the DX station,  etc.  While I suspect that 
the more reliable sources make a serious  effort to delete manager data as 
needed, I also suspect that in some sources,  once in, they stay in.
 
                     73, Dick, W2YE