Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
The APS Catalog has been deprecated and removed from all Plesk Obsidian versions. Applications already installed from the APS Catalog will continue working. However, Plesk will no longer provide support for APS applications.
Please be aware: with the Plesk Obsidian 18.0.78 release, the support for the ngx_pagespeed.so module will be deprecated and removed from the sw-nginx package.
Perhaps this could help
https://talk.plesk.com/threads/your-message-could-not-be-sent-the-senders-domain-is-not-registered-in-panel-or-is-misconfigured.335217/#post-788574
Hi,
After my Plesk Update from 12.0 to 12.5, i had the same problem.
I solved it by adding 127.0.0.0/8 and ::1/128 to the Whitelist in
the server e-mail configuration.
Give it a try.
Frank