Today marks the release of osTicket 1.18. This update includes an upgrade to the Laminas mail package included in osTicket.
Here are the release notes:
Enhancements
Improvements
The old branch (1.17) has also received a maintenance release v 1.17.4. You can read the release notes here: https://github.com/osTicket/osTicket/releases/tag/v1.17.4
As always please utilize the official download site osticket.com/download to download either release, language packs, or plugins.