Honestly, mirror inbox features of the mail service that starts with a G. and the navigation of the mail app that's fruit flavored. That would make switching to your service far more seamless. If I'm searching for an email and I know which inbox it is in I should be able to search for that email in that inbox, and not have to sift through other emails. Especially if it's a manual search because I can't remember the search term. Even if I am entering a search term though, having to sift through hundreds of unrelated emails is really frustrating.
Honestly, mirror inbox features of the mail service that starts with a G. and the navigation of the mail app that's fruit flavored. That would make switching to your service far more seamless. If I'm searching for an email and I know which inbox it is in I should be able to search for that email in that inbox, and not have to sift through other emails. Especially if it's a manual search because I can't remember the search term. Even if I am entering a search term though, having to sift through hundreds of unrelated emails is really frustrating.