A little background on the problem: I have been tasked with figuring out a problem in a Drupal site that I have no experience with. I have done Web Development using PHP, etc. but never used Drupal. I have a parent site with 3 sites underneath, and roles for each user (can be members of all sites or just one). I have a rule that sends an email out to these users after certain content is submitted. However, not all of the users receive the emails (about 150-180 users per email blast).
Does anyone have suggestions as to how I can go about debugging and figuring out this problem? I have to fix this by tomorrow. Here is what I have done so far:
-Made sure users were assigned to the role in the email rule. -Unchecked the box "send only to active users"
Any help is appreciated!