I did a trial of SaneBox - at this time since I am currently job hunting I am not yet going to pay past trial, but once i can afford it I am 100% getting it. I manage over 16 gmail inboxes - and they get wild, and the trial on my one personal inbox made it go from a 10 minute or so task a day, to optionally a minute to know if anything was urgent/important. Here is my referral code if you want to try it. Honestly was reducing my inbox stress. back to stressed. https://www.sanebox.com/signup/679977f876/c