MeSign - Encrypted Email Client

Sep 4, 2020

New and improved:
* Support device lock to unlock MeSign APP with fingerprint.
* Add attachment security scan before sending email.
* User can purchase the publicly trusted Vp Email Certificate.
* Add contacts by scanning QR code.
Fixed:
* Fix the issue of re-sending email after failed.
* Fix the issue that login may fail using POP3 protocol.
* Fix the issue of certificate display when the network is not available.
* Other issues fixed.