1. upload the spreadsheet and create a new group with the data calling it 'to delete' or something like that. 2. open the group and select all members of the group and change the status to 'Opt out' like this: http://grab.by/D5DM
hello! I used this method to opt out 7,000 email addresses. The disengaged group dropped to nearly zero active, but all the other groups haven't updated and still reflect their size prior my opting out the unengaged list. How long for my groups and segments to update? Thanks!