It seems that I haven't got an email notification for comment replies in a long time (for this account). I have "Send notifications to Email" checked in my settings.
I have got notifications in the past but the last one was 2022-01-18 despite me getting replies since then.
I did change my mail server at roughly that time but IDK why that would be a problem since I am getting other messages. (unless it is rejecting lemmy.ml for some reason?)