In a true DR scenario, you would have copies of your backed up configuration files at your DR site already, or backed up to media stored offsite that could be restored quickly. Email is not a secure way of sending any sensitive information, especially something with passwords embedded. Besides, what if in your disaster scenario your email system is down for an extended period - no config files! The backup feature of NCM is very good and could probably copy the config to more than one location (live site and DR site), or invoke a script to copy the configs to another location. Good luck!
I agree with mkomeara. NCM gives you a lot of possibilities what to do with the configs -- I suggest exploring the scripting functionality.