In the image above, the meaning of "Catrope" and "Roan Kattouw (WMF)" is not clear. In the UI it's clearer because of the icons we use.
We should either display those icons here too, or add clarifying text explaining what each of these things is. The latter might be helpful for the plain text emails too, which look like:
A new topic was created on your talk page: "Test topic" Testing notificatoin emails View topic: <https://www.mediawiki.org/wiki/Topic:T45mo789g5cxacua> Catrope: <https://www.mediawiki.org/wiki/User:Catrope> Roan Kattouw (WMF): <https://www.mediawiki.org/w/index.php?title=User_talk:Roan_Kattouw_(WMF)&topiclist_sortby=newest>