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Hi Marius, I read the wiki and it is really well documented. Thanks!
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Very cool! Thank you for sharing this. I'll can't wait to give it a try. :-)
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I think this is a good _howto_ for setting up these components. I suggest to categorize and link it as such.

Maybe beyond the intended scope of this issue, but I think we also need some short mentions under [[RedmineInstall#Optional-components|RedmineInstall#Optional-components]] and [[RedmineInstall#Optional-dependencies|RedmineInstall#Optional-dependencies]], and a short description under [[RedmineInstall#Configuration|RedmineInstall#Configuration]] with a link to a separate wiki page which should contain a (more) generic, more detailed description of (the handling of) background jobs in Redmine specific (e.g. what is handled by background jobs [also thinking about proposed #31076 here]) and Rails in general (how does Redmine relate to Rails in this area [via ActiveMailer, ActiveJob, Queues/QueueAdapters, 3rd-party queuing backends]). This should not be tied specifically to persistent, 3rd-party queuing backends, also the default in-process queuing implementation needs some coverage (see e.g. #31939, #31957).
Additionally, some info for plugin developers would be nice too.

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SPAM Message (Bernhard Rohloff)
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Is it possible to solve it under Windows-server? My configuration of Redmine:

Environment:
Redmine version 4.1.1.stable
Ruby version 2.6.6-p146 (2020-03-31) [x64-mingw32]
Rails version 5.2.4.2
Environment production
Database adapter Mysql2
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp
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David Doležal wrote:
> Is it possible to solve it under Windows-server? My configuration of Redmine:
>
> Environment:
> Redmine version 4.1.1.stable
> Ruby version 2.6.6-p146 (2020-03-31) [x64-mingw32]
> Rails version 5.2.4.2
> Environment production
> Database adapter Mysql2
> Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
> Mailer delivery smtp

My problem was diffrent. It was in connector on SMTP server, where was set low limit emails per minute from IP address. So simple! It works with Async and SuckerPunch. So I think it will work with Sidekiq too.

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