Is that just an artifact of its relative unpopularity? Running your own email server used to be easy too, before the spammers wrecked it. If Mastodon became pop

Is that just an artifact of its relative unpopularity? Running your own email server used to be easy too, before the spammers wrecked it. If Mastodon became popular, it would presumably come with a large spam problem, with the same sorts of solutions.