In our organization, we use LDAP authentication, and not all of our users are registered in quickbuild until they have a need to login. As a result, when they checkin code which triggers a failure (or is part of a build which failed), quickbuild is unable to resolve that subversion user to a quickbuild user. At this point, the e-mail is never sent to anyone, even if other users are resolved.

This should never be the case. If at least 1 e-mail address can be resolved, the mail should be sent. In addition, it would be helpful if we could map subversion users directly to e-mail addresses. IE, if a user is not found in quickbuild, automatically use <svnuser>@mycompany.com as their e-mail address.