diff --git a/lib/checks.py b/lib/checks.py
index c7bfc6a41f497c9db27af2ee91b78d41ea8e15bb..d9f7f1bb26c99c46f6b7ea10363f41f5e586625a 100644
--- a/lib/checks.py
+++ b/lib/checks.py
@@ -208,7 +208,8 @@ class CheckSMTP(Check):
     def build_command(self):
         command = ['/usr/lib/nagios/plugins/check_smtp',
                    '-H', self.addr,
-                   '-f', self._options.get('from', 'nonexisting@localhost'),
+                   '-f', self._options.get('from_addr',
+                                           'picomon@localhost.local'),
                    '-t', '2']
         if 'command' in self._options:
             command += ['-C', str(self._options['command'])]