Mailbird
Mozilla Thunderbird
Spike
Shift
Hiri
EverDesk
Foxmail
Pegasus Mail
Newton Mail (ex CloudMagic)
Microsoft Outlook
The Bat
Mail and Calendar
Postbox
Claws Mail
eM Client
Accu-Rate
Free version
Contact Management
Desktop/Mobile Sync
Documents Preview
Encrypted Database
HTML
Label and Tags
Local Junk Folder
Phishing filtering
Plugin
RRS Reader
Third-Party integration
Thread View
To-do
Tracking
app-integrations: App integrations
calendar: Calendar
contacts: Contats
customizable-layout: Customizable Layout
email-client-Mac: --- EMAIL CLIENT MAC
email-client-Mobile: --- EMAIL CLIENT MOBILE
email-client-Windows: --- EMAIL CLIENT WINDOWS
signature-management: Signature Management
snooze: Snooze function
unified-inbox: Unified Inbox