diff --git a/pyexecplugins/Mail.py b/pyexecplugins/Mail.py
index 1faf913..38e368e 100644
--- a/pyexecplugins/Mail.py
+++ b/pyexecplugins/Mail.py
@@ -48,7 +48,7 @@ class Plugin(PyExecPlugin):
             self.defaults = self.getDefaults(self.protocol)
             self.server = self.getConfig(config, "server")
             self.port = self.getConfig(config, "port")
-            self.user = self.getConfig(config, "user")
+            self.user = os.environ.get('smtp_user', self.getConfig(config, "user"))
             self.password = os.environ.get('smtp_pass', self.getConfig(config, "password"))
 
         logging.getLogger("pyexec").debug("Parsed config" + self.password)