I have a problem with my Thunderbird filters. I created a filter to move all mails with subject ABC into folder XYZ. This works as intended. However, as soon as I reply to one one those mails and put my own mail address a recipient (no matter if direct or cc or bcc), the filter will apply to that mail AS WELL AS my sent mail. I then have TWO identical mails in my folder YXZ but none in my sent folder. What am I doing wrong? I think this used to work in older Thunderbird versions.