Whenever I get any account information emails from "facebookmail.com" I spend 10 minutes trying to figure out if it's a phishing attempt. My opinion: Just use

Whenever I get any account information emails from "facebookmail.com" I spend 10 minutes trying to figure out if it's a phishing attempt. My opinion: Just use your real domain or if you must a subdomain, ie notify@mailer.startup.com.