how can I compare two contact lists in order to avoid repetition

[Pabs]

I must avoid repetition using two mailing lists. I was using excel to compare
the lists, but it seems it is not the way to do it. Is there a software to
compare data?

 

[Dan Pascal]

Hi Pabs,

Yes there is a software called QuickList that you can use to compare two
lists to eliminate duplicates. You can find it at this link:
http://www.emailaddressmanager.com/products.html

 

[Brian Tillman]

I must avoid repetition using two mailing lists. I was using excel to
compare the lists, but it seems it is not the way to do it. Is there
a software to compare data?

You shouldn't need to avoid repetition. If you send a message to two DLs
and those DLs both contain the same address, the recipient should receive
only one message.