Some systems have a limit of about 2000 characters for this form of email generation. If the email will not open try reducing the amount of text.
If Auto Action Emails are send automatically they are send through your Email server. You should see this on your server. Whether you see it in your Sent box or not depends on your Email programme.
If Auto Action Emails are sent manually via a link in the "Email Templates" list in the booking Beds24 will first try to send through your Email server. You should see this on your server. Whether you see it in your Sent box or not depends on your Email programme.
If this does not work it will pop and send through your desktop. In this case you will see it in your Sent box.
== Booking ==
Go to Booking to set up an auto action which modifies something in the booking.