Email blacklist capability for Send Message form
I would like the ability to maintain a site-wide email blacklist to prevent known spammers from exploiting the "Send Message" form.
Recently, one of my clients has been barraged with spam. The spammer is accessing the Send Message form and systematically sending emails to each member in the database -- over 1,000 so far.
As an administrator, I'd like the ability to maintain a blacklist for email addresses or domains that we know to be spam to prevent their emails from being delivered to our members.