I am after an e-mail client that lets me add custom columns, and sort and filter e-mails in a way similar to the way Excel works.
I manage a small team of researchers who do interviews with various people.
In my e-mail I get interview transcripts, updates on finding interviewees, deadline agreements, etc.
I currently manage all this by entering the dates and times of all my e-mails into an Excel spreadsheet. I then add new columns for Researcher Name, Topic, Interviewee etc. and quick notes in another column on how the interview went.
Adding the e-mails to the database is time consuming. I would prefer to have custom columns in my e-mail client and add the pertinent information there. I would then like to be able to filter the columns using tickboxes the same way it works in Excel (rather than just sorting them).