Set login name as default email from address

trytond/doc/topics/configuration.rst

@@ -445,6 +445,8 @@ For example::
 
     from: "Company Inc" <info@example.com>
 
+Default: The login name of the :abbr:`OS (Operating System)` user.
+
 retry
 ~~~~~
 

trytond/trytond/config.py

@@ -4,6 +4,7 @@ import configparser
 import logging
 import os
 import urllib.parse
+from getpass import getuser
 
 import __main__ as main
 
@@ -82,6 +83,7 @@ class TrytonConfigParser(configparser.ConfigParser):
         self.add_section('ssl')
         self.add_section('email')
         self.set('email', 'uri', 'smtp://localhost:25')
+        self.set('email', 'from', getuser())
         self.add_section('session')
         self.set('session', 'authentications', 'password')
         self.set('session', 'max_age', str(60 * 60 * 24 * 30))