Pros:

• Beneficial and reliable security mail service
• What something great here is encrypted, which means it is free for all
• The system is user-friendlyand good privacy protector
• A brilliant alternative to any other mails.
• Available on Android and iOS
• There is spam protection and custom spam filters.
• With two-factor authenticator

Cons:

• 1 GB storage is pretty small
• Doesn't have auto-response