|> cast_and_filter_recipients("to", follower_collection)
|> cast_and_filter_recipients("cc", follower_collection)
|> cast_and_filter_recipients("bto", follower_collection)
|> cast_and_filter_recipients("to", follower_collection)
|> cast_and_filter_recipients("cc", follower_collection)
|> cast_and_filter_recipients("bto", follower_collection)