Where do I find details about bounced emails in Discourse?

[peternlewis]

In case anyone else is confused as I was by this, the “error” column is actually called “Email Type”, so I came here looking after clicking on the other links in the table and the table entry itself, none of which did what I wanted and not thinking to click “digest” or “mailing_list” in the “Email Type” column to get the error information.