Give me a list of free email service provider other than Gmail.
1. Outlook: It is offering from Microsoft, and is considered a powerful email service. It integrates with other Microsoft service ecosystem and used by large business enterprises.
2. Proton: Formerly called ProtonMail, has a unique offering when it comes to privacy protecting email service provided and hence has a very unique service offering.
3. Yahoo! Mail: Yahoo offers this very mature email service and has a lot of custom inbox and themes options.
4. Zoho Mail: Another email provider that provided fully encrypted data and privacy protection. On the top, it also provides a very easy to use email migration service.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
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Answer the following query.
Give me a list of free email service provider other than Gmail.

user
1. Outlook: It is offering from Microsoft, and is considered a powerful email service. It integrates with other Microsoft service ecosystem and used by large business enterprises.
2. Proton: Formerly called ProtonMail, has a unique offering when it comes to privacy protecting email service provided and hence has a very unique service offering.
3. Yahoo! Mail: Yahoo offers this very mature email service and has a lot of custom inbox and themes options.
4. Zoho Mail: Another email provider that provided fully encrypted data and privacy protection. On the top, it also provides a very easy to use email migration service.
assistant