Customize subject format for standard emails

So you want to customize subject format for standard emails? Great, let’s get started!

The subject for standard emails can be customized from: Admin / Settings / Email / email subject

Available formatting options are:

%{optional_re}[%{site_name}] %{optional_pm}%{optional_cat}%{topic_title}

%{optional_re} → Re: (applicable if the post is a Reply)
%{site_name} → Community Title
%{optional_pm} → [PM] (applicable if the post is a Personal Message)
%{optional_cat} → [category] / [category/subcategory] {not applicable for uncategorized topics and PM)
%{topic_title} → Topic title

Complied subject for typical email notification:

[Community Title] [category] Topic title

Please note that a trailing whitespace will automatically be appended to %{optional_re}, %{optional_pm} and %{optional_cat}.

For Example, let’s consider this post:

https://meta.discourse.org/t/how-to-update-to-discourse-1-0/19328

The email subject formatting for Reply notification of above topic will be:

Complied subject for the above topic will be:

Re: [Discourse Meta] [howto] How to update to Discourse 1.0?

That’s it! You have successfully customized subject format for standard emails.

Source: https://meta.discourse.org/t/customize-subject-format-for-standard-emails/20801