Plesk Obsidian 18.0.79 Update 2 is now listed in the official Plesk changelog. This updates the existing 18.0.79 coverage because the same release train now includes a mail UI fix and third-party component updates for Roundcube 1.6.17 and ModSecurity 3.0.16.
The previous FixItPhill note for Plesk Obsidian 18.0.79 focused on Update 1, Docker, and PHP checks. Update 2 is smaller, but it still matters for hosting servers because Roundcube and ModSecurity sit close to customer email access, webmail support tickets, and web application firewall behavior.
What changed in Update 2
- Plesk Obsidian 18.0.79 Update 2 fixes a missing mail-account disk-usage bar after 18.0.79.
- Plesk updated Roundcube 1.6.17.
- Plesk updated ModSecurity 3.0.16.
- The current item belongs with the existing 18.0.79 article, so this post has been updated instead of duplicated.
Admin checklist
- Confirm a current server backup or provider recovery point before applying Plesk updates.
- Apply the latest Plesk Obsidian 18.0.79 micro-update where it is available for your platform.
- Open one or two customer mailboxes and confirm the mailbox disk-usage indicator appears correctly.
- Open Roundcube webmail and confirm login, message list, message view, and compose behavior.
- Review ModSecurity status and ruleset health after the update, especially on servers with custom exclusions.
FixItPhill guidance
Do not treat this as a rebuild project. Treat it as a short maintenance verification pass: update Plesk, check webmail, check ModSecurity status, check customer-facing sites for unexpected WAF blocks, and record the outcome for support continuity.
Source: Plesk Obsidian changelog for version 18.0.79 Update 2.
