Compare software

Mailspring vs NetEase Mail Master: catalog facts
Mailspring	NetEase Mail Master
Freemium The client is free and open source. Mailspring Pro is a monthly subscription that adds…	Free Free to download; NetEase also sells VIP mailbox plans separately.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS
Unified inbox, snooze, send later, rules and templates in the free tier C++ sync engine keeps memory and battery use down for an Electron app	Works with Chinese providers such as 163 and QQ as well as Outlook Available on desktop and mobile, including Linux
Read receipts and link tracking are paid, and are tracking features Electron, so still heavier than a native client	Interface and documentation are mainly in Chinese Linux package targets Ubuntu 22.04
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.