Would like to be able to do a sweep of inbox and auto delete overlapping emails, like the "Clean Up" feature in Outlook.
In outlook you can select all of your inbox, select "clean up" and all overlapping/extraneous emails (e.g. the earliest ones in a back and forth conversation) are purged. You can set the parameters for exceptions, so that anything starred is saved, etc.

-
sunnyside commented
Similar to sweep function on Outlook.
-
Jacob Sadowyj commented
Please add this. I get so many emails that refuse to unsubscribe me.
-
Shoo commented
This is sorely needed. It's a feature of Outlook that is so, so helpful. You can clean out your inbox so quickly. It's a pain to enter a search term, select all results, and then send them to Trash. And you have to do it multiple times.
-
Richard Alpagot commented
Also the fact that outlook can do this after 10 days is powerful.
Enough time to see/ read the newsletter is you want but also keeps the storage from growing building over time if you don't.
If you want to make it better than outlook. You could also search for key words like reciept / invoice and not auto sweep those "just in case". That'd be really cool.
-
Philip Roberts commented
I would like to bump this idea up. There are a number of emails I receive that are "daily digest" types, which I have no need of if I don't read them that day. A way of automating deletion or archiving, using the same system as the sieve filters but with the ability to run them on a once-per-day basis, would be very useful.
-
Alyson commented
Yes, please. This feature is badly needed.
-
Ursula commented
I would like to see a sweep function as Outlook has, where you can select, e.g., "keep the most recent e-mail of sender.com and move the others into x folder" or "keep the most recent e-mail of sender.com and delete/archive the rest. This would also make for a cleaner inbox. Thanks!