Mass email sending services, also known as email marketing services or bulk email services, are platforms that allow businesses and individuals to send large volumes of emails to a targeted audience. These services provide a convenient and efficient way to manage email campaigns, reaching a large number of recipients simultaneously.
One of the key features of mass email sending services is their ability to handle high volumes of emails without compromising deliverability.
Source-https://www.idealsmtp.com/bulk-email-services