I’ve found that while the “email domains blacklist” is super useful, I don’t believe it should be displayed directly within the Settings interface. The reason is that when you use the filter function and if you have a large blacklist, it takes the system longer to filter/search for keywords. I use a list available on GitHub that’s quite extensive with several thousand entries and this does slow things down quite a bit when hunting for things.
It might simply be best to define this blacklist via the
app.yaml or another config file.