Free email services with most free or unlimited space

AOL Mail

★ Space - Unlimited ★ Additional - Supports TLS/HTTPS, Spam and Virus protection, Spell checking, Supports POP3, SMTP, IMAP

Yahoo Mail

★ Space - 1,000 GB ★ Additional - Spam Blocker, Shared Inboxes, award-winning virus protection.

GMX Mail

★ Space - 65 GB ★ Additional - 10 Alias addresses, antivirus and spam protection, Encrypt email, 2FA security

Mail.com

★ Space - 65 GB ★ Additional - Antivirus protection and spam filter, 2FA security, Alias 10 address,  200 domain

Gmail

★ Space - 15 GB ★ Additional - Automated email filters and categories, inbuilt Chat, and Meet, 2FA security, spam email protection.

Outlook Mail

★ Space - 15 GB ★ Additional - Create an email signature, Sync Google or iPhone Calendar, Backup or Copy Mail, Export Contacts in CSV File

Yandex Mail

★ Space - 10 GB ★ Additional - Email sorting, pretty themes, include virus protection and spam blocking.

Zoho Mail

★ Space - 5 GB ★ Additional - 25 Business Addresses, secure, encrypted and Ad-Free email , Keyboard shortcuts.

iCloud Mail

★ Space - 5 GB ★ Additional -  Include spam filter, email aliases, 2FA security

Proton Mail

★ Space - 500 MB ★ Additional - Encrypted messages, import CSV contact, private email, Quick filters.