Special notices
This section highlights the special notices that should be taken into consideration before upgrading your platform.
TFTP firmware install
Using TFTP via the serial console to install firmware during system boot time will erase all current FortiMail configurations and replace them with factory default settings.
Monitor settings for the web UI
To view all objects in the web UI properly, Fortinet recommends setting your monitor to a screen resolution of at least 1280x1024.
Recommended browsers on desktop computers for administration and webmail access
- Microsoft 44, 83
- Firefox 78
- Safari 13
- Chrome 84
Recommended browsers for mobile devices for webmail access
- Official Safari browser for iOS 13
- Official Google Chrome browser for Android 9, 10
FortiSandbox support
- FortiSandbox 2.3 and above
SSH connection
For security reasons, starting from 5.4.2 release, FortiMail stopped supporting SSH connections with plain-text password authentication. Instead, challenge/response should be used.