Is there a way to implement automatic verification of e-mail addresses in Outlook?
What I would like to achieve is
- users can send e-mails only to addresses which are in address book or on some LDAP directory
- if any of the e-mails are not in those directories e-mail is held until user either removes unregistered recipient or registers such recipient
If the above is not possible are there some other suggestions that would make sending e-mails to a wrong address less likely.