6.2.5 Version 4.5.3

4.5.3 MetaDefender Email Security release

Release Date: January 16, 2019

MetaDefender Email Security 4.5.3 is a maintenance release focused on protocol improvements

Fixed

TLS 1.2 support
  • SMTP server protocol now fully supports TLS 1.2.

  • MetaDefender Core communication protocol now fully supports TLS 1.2.

Improved SMTP response messages

SMTP server 4.x & 5.x messages now describes reason for rejection.