Apps like K-9 Mail

Here are some great alternatives to K-9 Mail by Mozilla Thunderbird :
R2Mail2
R2Mail2
★3.8
OpenKeychain: Easy PGP
OpenKeychain: Easy PGP
★4.0
BirdBox
BirdBox
★4.8
eM Client - Secure Email App
eM Client - Secure Email App
★3.3
mail.ch Mail
mail.ch Mail
★3.6
mail.co.uk Mail
mail.co.uk Mail
★4.4
Email Blue Mail - Calendar
Email Blue Mail - Calendar
★4.3
Proton Mail: Encrypted Email
Proton Mail: Encrypted Email
★4.5
FlowCrypt Encrypted Email
FlowCrypt Encrypted Email
★4.0
Mailfence secure private email
Mailfence secure private email
★3.8
Tuta: Secure & Private Mail
Tuta: Secure & Private Mail
★4.6
TypeApp mail - email app
TypeApp mail - email app
★4.2
Free Mailer - Mail Client
Free Mailer - Mail Client
★3.6
Guerrilla Mail - Temp Mail
Guerrilla Mail - Temp Mail
★3.8
One Mail : Fast And Secure
One Mail : Fast And Secure
★4.7
mail.com: Email app & Cloud
mail.com: Email app & Cloud
★4.5