Hey,

Did those relay operators really sent an abuse report?
Can you ask Hetzner about the origin?

didn't notice at first, but this wasn't some abuse report from "portscanned" ISP. rather an internal hetzner report. 

abuse report subject :  Abuse Message [AbuseID:xxxxxxx]: NetscanOutLevel: scansnarf-ng detected Netscan from xxx.xxx.xxx.xxx

body starts with : "We have indications that there was an attack from your server. Please take all necessary measures to avoid this in the future and to solve the issue."

attaching their abuse report txt file.

best,

d.