Hi, I saw the last request was 7 years ago, for a common Thunderbird feature. So even with the newest major, just released a few weeks ago, it is still not possible to use a ruleset based on a distribution list, instead of adding again all the required contacts into the rule itself?
Yes, Thunderbird filters are a bit different to eM Client Rules.
I doubt you would see something like that in eM Client Rules, because they only look for information in the message and then act on it. A distribution list is not part of a message at all.