I am using Windows 10, Thunderbird V. 78.10.0. I have two email accounts set up in Thunderbird. One is a RoadRunner account and the other is a gmail account. My problem is that all of the mail that comes to either of these accounts is duplicated in the other account. In other words, most of the mail I am receiving in my RR account shows up in the gmail inbox....and likewise most of the mail addressed to my gmail account is showing up in the RR inbox. I, for the life of me, cannot figure out how to modifiy the settings to correct this. Can you help? Thank you. Paul Sugar psugar38@rochester.rr.com