Description
This article addresses an issue with the synchronization between FortiMail and NAS/NFS, where FortiMail shows the message 'failed to mount' after an upgrade to v5.4.x.
Solution
The FortiMail in versions v5.3.x and earlier with NAS/NFS synchronized shows the following messages after it has been upgraded to v5.4.x:
nasd: failed to mount /var/spool/home.remote
nasd: failed to mount NAS for build
This issue occurs because FortiMail v5.3.x and earlier are compatible with NFSv3 or earlier. However, v5.4.x is only compatible with NFSv4.
To solve the issue, upgrade the NAS NFSv3 (or earlier) to NFSv4.
Related documents:
FortiMail Traffic Types and TCP/UDP Ports
FortiMail FAQ
Technical Note: Storing Email on a Remote Server in FortiMail
Technical Note: Storing mail data and quarantine reports in config-only HA mode
