Notes for upgrading from Metadefender Email Security v3
It is not possible to directly upgrade Metadefender Email Security v3 to v4. Metadefender Email Security v3 comes built into Metadefender Core v3. Uninstall Metadefender Core v3 first, then start a fresh installation.
There is no support for importing Metadefender Email Security v3 configuration into Metadefender Email Security v4. The configuration must be migrated manually.
Upgrading from Metadefender Email Security v4
To upgrade from a former version of Metadefender Email Security v4 a simple installation of the latest version is enough.
All existing Metadefender Email Security configuration and data will be kept during the upgrade.
Changing between on-site SMTP and on-site Exchange mode during an upgrade
Security rules of an on-site SMTP deployment and an on-site Exchange Server deployment are not compatible.
In case of on-site SMTP deployments each security rule must have an SMTP relay configured where emails are sent forward at the end of processing.
In case of on-site Exchange Server deployments there is, however, no need for explicit relay configuration (it is disabled). Emails are sent back to Exchange Server automatically at the end of processing.
As a consequence of rule incompatibility:
processing emails won't work as expected and
security rules require manual adjustments
after changing between on-site SMTP and on-site Exchange mode.