We've got a watchlist feature where it'll stop sending you e-mails until you view the page, and an open bug on how this makes it easy to view or ignore it in a way that makes it so that you stop getting notifications you DO want.
That does bring up an idea here. We can have e-mail notifications on each notification and a "Don't email me individual notification emails" option (maybe a clearer name) that will send out one e-mail and won't send out another until the user has visited the Special: page with notifications. Unlike articles a notification Special: page requires you to be logged in to see, and as a result doesn't suffer from the same issue.
If it's a low traffic wiki, seeing a series of diffs for articles as separate notifications in a notification area might be nice too.