Hi there I have been tagged with finding a solution to purge invalid and duplicate email addresses from our numerous Lists. We are currently using ListServ 14.4 on Windows 2003 and I was wondering if ListServ has any built-in capabilities to do that or if it is possible to import a text file back into ListServ once it has been cleaned up. I was thinking about exporting the subscribers of a list and then running it through some email verification program and then somehow importing the cleaned up list back into the List, etc. Thank you for all your help Satnam