GreenArrow Email Software Documentation

Supported Linux Distributions

All Supported Distributions

We ship GreenArrow packages for the following 64-bit Linux distributions:

Linux Distribution Supported Until 1
Alma Linux 8.x 2 May 31, 2029
Red Hat Enterprise Linux 8.x 2 May 31, 2029
Ubuntu Server 20.04 LTS 2 April 2025
Debian 10.x Stable 2 July 6, 2024
CentOS, Red Hat Enterprise Linux, and Scientific Linux 7.x June 30, 2024
Ubuntu Server 18.04 LTS April 2023
Debian 9.x Stable June 2022
CentOS 8.x 3 December 31, 2021
  1. The date when the Linux distribution’s vendor has indicated they will discontinue support. We plan to ship GreenArrow updates for each Linux distribution until that date.
  2. Using the latest supported version of your preferred Linux distribution gives you the longest time before it will need an upgrade to a later version.
  3. In December 2020, RedHat announced that they would end support for CentOS 8 on December 31, 2021. CentOS 8 was previously going to remain in support until May 31, 2029. We had no control over this change and are now evaluating potential CentOS 8 replacements.

Moving to a Supported Distribution

If you find yourself on Linux distribution that’s end-of-life or will be soon, you have these options for getting off of it:

  1. If you’re running Debian or Ubuntu, upgrade to the next major release.
  2. Migrate to a new server. Most customers who use Red Hat or CentOS choose this option.
  3. Take a set of backups, upgrade your existing server to a new Linux distribution, then restore the backups.

You can migrate or backup your GreenArrow installation using the above links, or have us do the migration or backup for you. Please contact GreenArrow’s technical support if you’d like assistance.

End of Life Linux Distributions

We no longer release GreenArrow updates for the following Linux distributions:

Linux Distribution Supported Until
Ubuntu Server 16.04 LTS April 2021
CentOS, Red Hat Enterprise Linux, and Scientific Linux 6.x 64-bit November 30, 2020
CentOS, Red Hat Enterprise Linux, and Scientific Linux 6.x 32-bit January 31, 20201
Ubuntu 14.04 64-bit April 2019
Debian 7 64-bit May 2018
Ubuntu 12.04 64-bit April 2017
CentOS, Red Hat Enterprise Linux, and Scientific Linux 5.x 32-bit and 64-bit March 31, 2017
  1. We ended support early for this 32-bit distribution because we found that in 2020, all customers using it were on the 64-bit version.

Running an End-of-Life Linux Distribution

We strongly recommend against using an end-of-life Linux distribution, because receiving security updates and bugfixes is important. With that said, we’ll continue to support GreenArrow on an end-of-life Linux distribution with the following caveats:

  1. If you stay on an end-of-life distribution and encounter a bug that we fixed in a version of GreenArrow that was released after your distribution went end-of-life, we will not backport our bugfix. You’ll need to migrate to a still supported distribution to get the bugfix.

  2. If we think an issue could be caused by using an end-of-life Linux distribution, then we may require a migration to a non-end-of-life Linux distribution as a condition of continued support.


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