It doesn’t appear to be. The only emails I’m receiving are those initiated by WP or bbPress. The emails related to activation, group requests, mentions, and other BuddyPress emails are not coming through.
I see this was about a week ago, but I’m having the same problem. I’ve tried many of the plugins mentioned in other threads, but haven’t had any luck with any of them. I’m on Media Temple’s Grid service (not their WP hosting) and I’ve checked the mail settings, spam folders, with no luck.