The original message was received at Sun, 8 Dec 2019 13:18:32 +0100 (CET) from m-relay4.rz.uni-saarland.de [134.96.7.233] ----- The following addresses had permanent fatal errors ----- <rektor(a)htwsaar.de&gt; (expanded from: <rektor(a)htwsaar.de>) ----- Transcript of session follows ----- 554 5.0.0 MX list for itz-mail.htw-saarland.de points back to itz-mail.htw-saarland.de 554 5.3.5 Local configuration error