are there any plans to provide stats on Broadcast Message email delivery ?
As well as knowing who opens the emails and when, it would be very helpful to know when emails bounce. Without this we cannot delete users whose emails no longer work and will result in an increase in spam rating over time.
i don't think you will be able to tell if the user opened up an email...that may violate a privacy notice of either you, the email provider, NING, or all 3, being from one service crossing to another.
to find out if who's emails are still and still not good, you can download your member contact info as a .csv file, create a group of contacts in your email named the same as your network, add them to it, then try to send an email to that group. any that bounce back are no longer active emails. The problem with deleting those members, though, is you may end up deleting someone who, even though they don't have (or use) that email anymore, they may still visit your network from time to time, and simply use that email address as their login.
Actually this is very standard for email mailing programs. If you send an HTML email then it can be tracked as to when it was opened, by who, which links were clicked on, who it was forwarded to and so on.
Your point about deleting someone whose email address does not work is a good one. What that suggests is that we need the ability to stop sending emails to someone whose email address is dead but not delete them.