Pros
Send one email to all customers who raised similar cases
Emails get added as Email message to the respective cases
When customer replies on the email, the respective case owner will get notified and the email will be related to the case
This is a fail-safe solution, hence the customer will receive email successfully without any error
Available for all editions of Salesforce orgs
Email messages are sent through Salesforce without using any external application
Cons
The customers will receive email within 10 minutes of sending it from Salesforce
