keep magento from going into maintenance mode

[reinvention18]

So my website goes into maintenance mode randomly every few days. I open the maintenance file and its blank. So I found a one time a work around where you edit the index file to where you blank the portion out that tells the site to go into maintenance mode. I forgot exactly which portion. Any ideas? thanks

[OST Agency]

Starting with Magento 1.9.1 the emails are not being sent directly during checkout but instead are being queued. The queue is being processed via your Magento cronjob - please ensure this has been set up and is running correctly.

The extension AOE_Scheduler can help you in confirming that your Magento cronjob has been configured correctly and is running.