Thread:Translating talk:StatusNet/7c98bb277b37bb0b8568c2a5fb413bed26bb35ef-1$s (@ 2$s) sent a notice to („%1$s (@%2$s) hat dir eine Nachricht gesendet, um deine Aufmerksamkeit zu erlangen“)/reply

It's perfectly fine. Could be something like "Siebrand Mazeland (siebrand) sent a notice to your attention" as e-mail subject.