As a standard Discourse user, I want to see standardized indication of the category assigned to a post when I receive e-mail notifications, so I can better prioritize what I reply to and when.
Rationale: We’re working really hard to migrate people from a series of several mailing lists over to Discourse, and being able to specify categories in notifications somehow is pretty important to attracting those people who still want to live in their inbox. If the category were specified in the subject line or an e-mail header, those people, could then automatically filter and sort notifications.
If the e-mail subject were used, perhaps the site name could be moved to the “From” field in a manner such as
"downey via My Discourse Instance <discourse-REPLYKEY@example.com>". The subject could then read something like “
[feature] Show categories in e-mail notifications”.
Alternative: I know that as of today we can now customize the
email_prefix which is a step in the right direction. Maybe it could be something as simple as the user entering a variable name in the
email_prefix setting, so people could still use a “generic” prefix if they wish.