send limit email wording updates

app/views/app_mailer/server_send_limit_approaching.text.erb

@@ -5,7 +5,7 @@ Server: <%= @server.name %>
 Send Limit: <%= @server.send_limit %>
 Current Volume: <%= @server.send_volume %>
 
-When you reach your limit, any mail you send will be held in our system until it is manually unheld by you through our web interface or using our API.
+When you reach your limit, any mail you send will be held in the system until it is manually unheld by you through the web interface or using the API.
 
 You can view more information about this server at: