9.0.4: How is "Mail Sender" determined in Object Activity Log?

Mh, I don't understand - user #1 is the admin, yes, but it's not the user shown as the mail sender in the Activity Stream screenshot in the original post / question:



That's the user account with the ID #6, of which I gave the details in the previous post.

This might be a possible reason.

The "integrated" cron is a nice feature, however I always wondered how it actually works - for example, most PHP configurations imply a time limit on scripts executed by the web server, does this also apply to the cron thread?

Other web applications, like NextCloud for example, require the administrator to setup a real cron job on server side which calls a specific php script as a specific user at specific intervals - granted, this requires more access to the server than just being able to upload PHP files, but it should be possible in many cases and then cron should be more reliable, probably.

Maybe this could at least be an additional option, besides the "automatic" "integrated" cron - or is it maybe even already possible?

 It's easy when you target the application to one specific Operating System.
We want ProjeQtOr to be OS independant, so Linux Cron is not a solution.

NextCloud for example provides both options: Some cron mode similar to what you're doing, and optionally the invocation of the cron script by a separate job scheduler.

Windows OSes also have the Task Scheduler (not Task Manager) which can be used to periodically schedule program executions, so this mode would not be limited to Linux or other Unix-like platforms.