Apps like Thunderbird: Free Your Inbox

Here are some great alternatives to Thunderbird: Free Your Inbox by Mozilla Thunderbird :
BirdBox
BirdBox
★4.8
Mail for Hotmail & Outlook
Mail for Hotmail & Outlook
★4.1
All Email Login
All Email Login
★3.4
Temp Inbox - Email & SMS
Temp Inbox - Email & SMS
★4.7
Mailfence secure private email
Mailfence secure private email
★3.8
BlackBerry Hub+ Inbox
BlackBerry Hub+ Inbox
★3.4
Temp Email - Anonymous Mail
Temp Email - Anonymous Mail
★4.4
All Email Hub
All Email Hub
★4.2
Inboxes - Multi Temp Email
Inboxes - Multi Temp Email
★4.0
All Email Login Access
All Email Login Access
★4.5
Email Go: All email app
Email Go: All email app
★4.2
One Mail : Fast And Secure
One Mail : Fast And Secure
★4.6
Proton Mail: Encrypted Email
Proton Mail: Encrypted Email
★4.5
Email Blue Mail - Calendar
Email Blue Mail - Calendar
★4.2
Temporary Email - Temail
Temporary Email - Temail
★4.4
SecureMyEmail Encrypted Email
SecureMyEmail Encrypted Email
★3.6