Re: Newsletter by email
I for one am not sure what you are looking for.
Are you looking to use the email addresses from the bbPress installation to send out an email newsletter? So, the registration emails become your mailing list? What will the newsletter content be? Is the content from your forums? And if so, what content will be sent?
Also, if people did not opt in to your newsletter (they just registered on your site), you could be spamming them with a newsletter they didn’t ask for. That’s illegal in the US (CAN-SPAM compliance) and might be illegal in other countries too.