Why is the "Execute asynchronously (the main operation does not wait...)" option disabled for Send e-mail notification action? Is it because email is always sent asynchronously?
We have a business rule that sends email when some specific properties are modified in a User object. However, there is a delay of about 10-15 seconds, on an average, on the web interface due to this. If we disable this business rule, the confirmation on the web interface is almost instantaneous.
It looks like the send email is not working asynchronously and the option to set it as asynchronous is also disabled.
Is there a way to work around this?