Fortimail VM004 Upgrade path

[Nemat]

dears,

We need to perform upgrade path to our fortimail, I can not find the upgrde path, also what is the preferred firmware comming from v6.4.1(GA), build414?

Thanks. 

[abarushka]

Hello,

You can find an upgrade path in FortiMail release notes. Please also check "Known Issues" section in the release notes before performing an upgrade.