Open free mail

Here are some popular free email services:

1. Gmail (Google): One of the most popular and widely used free email services, with a storage capacity of 15 GB.
2. Yahoo Mail: Another well-known free email service, with a storage capacity of 1 TB (1,000 GB).
3. Outlook.com (Microsoft): A free email service from Microsoft, with a storage capacity of 5 GB.
4. ProtonMail: A free, open-source email service that focuses on security and privacy, with a storage capacity of 500 MB.
5. Tutanota: A free, open-source email service that also prioritizes security and privacy, with a storage capacity of 1 GB.
6. Mail.com: A free email service with a storage capacity of 2 GB.
7. Zoho Mail: A free email service with a storage capacity of 5 GB.
8. FastMail: A free email service with a storage capacity of 1 GB.

Please note that while these services are free, they may have limitations, such as limited storage capacity, ads, or restrictions on features.