Say that I have two lists of emails, that look something like
email@example.com, firstname.lastname@example.org, email@example.com firstname.lastname@example.org, email@example.com
and I need to put them together into one big list while eliminating duplicates, so it will look like
firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com
these lists are large (50+), so doing it manually requires a lot of time.
The problem is, that I need a farily regular user to do this, so it can't involve any programming. An ideal way would be for him to just paste those lists, click once and get the resulting list.
Are there any utilities that can do this easily? I can imagine MS Excel doing something like this, but I don't really know how to approach it. If you have any solution not involving Excel, I'll gladly accept it.