I Recommend that you only Email me in these situations:
If there's a private matter you need to discuss with me about and you cannot talk about it with anyone else
If you want to Speak about an attack page that I blanked
If you have any issue with my editing that includes discussing about a private matter (Such as something that would be Oversightable or a issue outside A Wikimedia project)
If you see a threat of harm or any sign that an editor may try and kill themselves. You should follow the instructions at the policy page and if it was a threat of harm, Contact the the Arbiration Committeehere as well as the instructions at the policy page
If you see vandalism and don't know what to do. Report it on my talk page with a diff of the vandalism. If you don't get a response shortly report it on another editor's talk page or to an Administrator. Then read WP:VANDALISM to see how you can take care of it yourself