SharePoint Designer Workflow 2013 - Access Denied while Email

Issue :

I had a scenario where we have to send email to a SharePoint Group where initiator does not belong to that group.

While triggering e-mail to that group, workflow threw an error saying

 "Access denied. You do not have permission to perform this action or access this resource".

Resolution 1:

1.  Go to Site Settings -> Site Permissions
2. Select Group to which you are sending e-mails.
3. In group settings, set "Who can view the membership of the group ?" to Everyone

Resolution 2:

1. Go to Site Settings -> Site Permissions -> Permissions Levels
2. Open Permission level which is assigned to current user or the group where current user is added.
3. Make sure, user is having "Create Alerts " permission as shown below.