Typically, a Internet Service Provider (ISP) offers various services to its customers to enable them to access and utilize the internet. However, there are certain services that may not be provided by a typical ISP. One such service is an E-mail address.

Explanation:

An E-mail address is a unique identifier that allows individuals to send and receive electronic messages over the internet. While it is true that many ISPs offer e-mail services as part of their overall package, it is not a service that is always provided by every ISP. Here's why:

1. Focus on internet connectivity:
Most ISPs primarily focus on providing internet connectivity to their customers. They invest in infrastructure, such as cables and routers, to deliver high-speed internet access. Their main goal is to ensure that customers can connect to the internet seamlessly. Providing e-mail services may not be their primary focus or expertise.

2. Collaboration with email service providers:
Instead of developing and maintaining their own e-mail infrastructure, ISPs often collaborate with popular email service providers like Gmail, Yahoo, or Outlook. These email service providers specialize in offering reliable and secure email services to millions of users. ISPs may provide their customers with the option to create an email address that is integrated with these external email platforms.

3. Third-party email services:
Customers also have the flexibility to choose their own email service providers independent of their ISP. They can opt for free or paid email services from various providers available in the market. These email services can be accessed using any internet connection and are not tied to a specific ISP.

In conclusion, while some ISPs do offer e-mail services, it is not a service that is universally provided by every ISP. Internet connectivity and technical support are typically the core services offered by ISPs, whereas e-mail services are often outsourced or left to the customer's discretion.