Is there any way to fetch all users into a list in rules? I want to know if there is any way to fetch all users into a list in Rules?

I used Views Bulk Operations (VBO) and "Load items from VBO" in Rules. But it seems it doesn't work !!
I'm assuming your question is about D7. A possible answer to your question is to use the Views Rules module, as further detailed below.
1. About the Views Rules module
The Views Rules module makes Views data available in Rules, enabling intuitive rule configuration for dynamic data. Some details from its project page:

... provides two types of elements in Rules, configured with a &quot;Rules&quot; view display:

Views loop: A views loop is similar to a regular Rules loop, but allows looping over rows of view results.


Collect view result rows (action): This action collects each variable in all view result rows into list variables for use in Rules.


Tip: When selecting the data type for variables in the view, if the field is an entity identifier (e.g. Node ID), you can set the data type to the entity type (i.e. Node) to directly use the variable in Rules as an entity!

2. Create a view of display type 'Rules'
After you enable the Views Rules module, you can use Views to create a view of those users you want &quot;to fetch into a list in rules&quot; (as in your question). Add of view of display type Rules (important, that's the key to make it work!). Here is how you can add such display:

Next configure the row variables, by using the link that says &quot;edit field info&quot;, as shown here:

You probably want to use one or more of the variables similar to those that are shown in this screenprint:

3. Create a rule using the view of display type 'Rules'
Create the appropriate Rules Actions in your rule, using these guidelines:

Use the link that says Add view loop to add a Views loop, and select the &quot;Rules&quot; display created in the previous step.
Configure the parameters and variable names.
For each user contained in your Views loop, perform whatever Rules Action that fits your requirement, using the variables you configured at the end of the previous step (you may have to revisit the previous step to add more similar variables there if needed). If you created the Rules row variables as suggested in the previous step, your actual eMail can use tokens such as [usermail:value], [username:value], etc.

Easy, no?