v5.3.2
This release is a focus of performance improvements for DNS resolution and Spamassassin message evaluation. Bind9 has been replaced with the Unbound caching DNS server. Unbound is lighter weight and generally considered a faster DNS server. With Spamassassin being very DNS dependent, making this change has led to significant performance improvements in testing.
This release is only available for Ubuntu 22.04 and later due to library requirements. You will need to upgrade your OS using do-release-upgrade until you get to Ubuntu 22.04 before the new Mailborder software will be available to install. The End of Life for Ubuntu 20.04 is April 2025, so it time to upgrade anyway if you are using that OS or earlier.
If you need help upgrading the OS, contact Mailborder support and we will schedule a time to upgrade your server(s). If you have Premium Support, the assistance from Mailborder support to perform the upgrade is included at no additional cost. Otherwise, there will be a fee of $159 to assist in the upgrade.
Changelog
- Bind9 has been replaced with Unbound caching DNS server.
- /etc/default/spamassassin has been updated with new configuration options. It also includes different options for different server sizes.
- Unbound has a custom configuration that focuses on speed.
- DNS root server hints file will now be updated automatically with each Mailborder version update.
- Postfix configuration build was updated to better block blacklisted remote MTAs
- Spamassassin debug will now run during configuration rebuilds to filter out any problem rules.
- Javascript updates in the GUI.
Getting the Most out of DNS
The caching DNS server that comes with Mailborder will provide improved performance results, but you must configure your server to use it. The following will set your primary DNS server to the one running on Mailborder with secondary public DNS servers.
Edit the file: /etc/systemd/resolved.conf
Under the [Resolve] section, make the following changes:
DNS=127.0.0.1 1.1.1.1 8.8.8.8 DNSStubListener=no
Save the file and run this command:
sudo systemctl restart systemd-resolved
Next, edit the file in the /etc/netplan/ directory. The name can vary, but it is usually something like 50-cloud-init.yaml.
In that file, find the nameserver section and set 127.0.0.1 as the first DNS server. Run this command to apply the settings:
netplan try
How to Upgrade Mailborder
Run the following commands as the root user:
apt-get update
apt-get dist-upgrade
OS Upgrade Support
We offer support for OS upgrades. If you have an annual support contract, this support is included without charge. If you do not have a support contract, we will perform a scheduled upgrade for you remotely for a discounted rate of $159. This service is highly recommended even if you are adept with Linux.
Contact: https://www.mailborder.com/contact
Ubuntu 24.04 LTS
The end of (free) support for Ubuntu 24.04 is in April 2029.
Ubuntu 22.04 LTS
The end of (free) support for Ubuntu 22.04 is in April 2027.
Ubuntu 20.04 LTS
The end of (free) support for Ubuntu 20.04 is in April 2025.
Ubuntu 18.04 LTS
Support for Ubuntu 18.04 ended in April 2023.
If you have not upgraded to at least Ubuntu 22.04 (as of this writing in Jan 2025), we suggest that you do so. However, we do recommend that you contact Mailborder support prior to doing the upgrade. It is not straight forward and requires manually correcting several modules. We highly recommend the support option for upgrades.
19 January 2025