Skachat Programmu Elektronnaia — Pochta

: Free version has limits (1GB storage, 150 messages/day); requires a "Bridge" app for desktop client use.

: Windows, macOS, Linux, and Android (currently in beta). Best for Privacy & Security: Proton Mail skachat programmu elektronnaia pochta

: Merges accounts (Gmail, Outlook, iCloud) into one view. : Free version has limits (1GB storage, 150

: Completely free, highly customizable through add-ons, and stores mail locally for offline access. highly customizable through add-ons

: Standard SSL/TLS is minimum; seek PGP or end-to-end for sensitive data.