bring back "Mail Group" functionality.
In plesk 8 and 9, there were "Mail Groups" where you could simply check members of the local domain that you wanted to include. Now you must type in every recipient of a forwarding account manually. More critically, if you delete a user on the local domain, they are not automatically removed from the forward list like they were when Mail Group functionality existed. This means bounces start to occur until they are removed from every forward list they're in.

Unfortunately, we have to close your request, because over the years it has not become quite popular for further implementation.
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IG
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Chris commented
The feature is very useful in a company email environment. One of the main reasons we chose Plesk over other control panels. We previously used CPanel and had many issues with keeping the groups up-to-date.