Subject placeholder for first error line

config/log_monitor.config

@@ -30,11 +30,12 @@
           %% Placeholders:
           %% %f: the full path of the log file (ex. /var/log/myapp.log).
           %% %F: the basename of the log file (ex. myapp).
+          %% %l: the first error line.
           {subject, "[%F] Error notification"},
 
           {connection, [
-            {relay, "smtp.fabiosalvinii.com"},
-            {username, "salvini.fabio001@gmail.com"},
+            {relay, "smtp.nodomain.com"},
+            {username, ""},
             {password, ""}]
           }
         ]

config/logfiles.config

@@ -1,8 +1,9 @@
 {monitored_logs, [
     {
         {group, "Test"},
-        {email_receivers, ["user@example.com"]},
-        {email_subject, "[%F] Error notification"},
+        {email_receivers, []},
+        {email_subject, "[%F] %l"},
+        %% Currently ignored
         {default_error_regex, "Error"},
         {logfiles, [
             {