diff --git a/addons/mail/mail_message.py b/addons/mail/mail_message.py
index de8e4c68fda..b29642180e8 100644
--- a/addons/mail/mail_message.py
+++ b/addons/mail/mail_message.py
@@ -201,7 +201,7 @@ class mail_message(osv.Model):
 
     def _get_default_from(self, cr, uid, context=None):
         this = self.pool.get('res.users').browse(cr, SUPERUSER_ID, uid, context=context)
-        if this.alias_domain:
+        if this.alias_name and this.alias_domain:
             return '%s <%s@%s>' % (this.name, this.alias_name, this.alias_domain)
         elif this.email:
             return '%s <%s>' % (this.name, this.email)