MailVault v3.4.6 is available.
This is a minor release with a couple of small fixes and a useful enhancement.
When disk space becomes critically low, MailVault will automatically stop the archiving process (including retrieving of email, if required) and send out an email alert to the administrator. The admin will need to free up space and manually restart the stopped services.
You can upgrade your MailVault installation by going to:
Settings > Core > Auto updates and click on Check for updates
Then simply follow the on-screen instructions.