Mindtraveller Messages: 917 Registered: August 2007 Location: Russia, Moscow rgn.
Experienced Contributor
Servers usually accept login which is equal to "FROM:" record because of their internal options. It is done to fight spam and phishing. For example, one may send someone email and make FROM: admin@google.com with request to change user's password on some links which redirects to his deface/phishing resource. To prevent it, those mail servers which are well configured, prevent you from using names different from your login.