Email has undergone several innovations since its inception in the 1970 s. Here are some of the major innovations that have transformed the way we use email:

1. Mobile Email: The rise of smartphones and mobile devices has made it possible to access email on the go. Mobile email clients and apps have been developed that allow users to send, receive, and manage their emails from their smartphones.
2. Spam Filters: As email became more popular, so did spam. To combat the problem of unwanted emails, email service providers developed spam filters that can automatically detect and block spam emails.
3. Email Encryption: Encryption technology has been developed that allows users to encrypt their emails to protect them from interception and unauthorized access.
4. Social Media Integration: Some email clients have integrated social media features into their platforms, allowing users to access and manage their social media accounts from their email inbox.
5. Artificial Intelligence: AI is being used to develop smart email clients that can automatically categorize and prioritize emails, suggest responses, and perform other tasks to help users manage their email more efficiently.
6. Email Marketing Automation: Email marketing has become a popular way for businesses to reach and engage with customers. Email marketing automation tools have been developed that allow businesses to create and send targeted and personalized email campaigns to their subscribers.

Overall, these innovations have made email more convenient, secure, and efficient for users.