I’ve been digging some more, and these outgoing emails are being blocked by the server at Arvixe. So if anyone is having a similar problem, remember to check for bounced messages in the webmail on the server 😉
I installed and activated the plugin bp-email-to-wp-mail-from-bridge but notifications still can’t be sent from BP. I’m on Arvixe who seem to be blocking the “normal” WP mail functions, though WP-Mail-SMTP works and the test mails come through.
From what redokodesign says, he seems to be using both of these plugins? Not working for me with BP 2.5.2 and WP 4.4.2.