=== Trying mx01.nausch.org:25...
=== Connected to mx01.nausch.org.
<-  220 mx01.nausch.org ESMTP Postfix
 -> EHLO mail.sys4.de
<-  250-mx01.nausch.org
<-  250-PIPELINING
<-  250-SIZE 52428800
<-  250-ETRN
<-  250-STARTTLS
<-  250-ENHANCEDSTATUSCODES
<-  250 8BITMIME
 -> MAIL FROM:<p@sys4.de>
<-  250 2.1.0 Ok
 -> RCPT TO:<django@nausch.org>
<** 571 5.7.1 Session encryption is required. Contact your postmaster/admin for technical assistance. He can achieve our postmaster via email: postmaster@nausch.org or via fax: +49 8121 883179. In any case, please provide the following information in your problem report: This error message, time (Oct 12 10:44:38), client (194.126.158.132) and server (mx01.nausch.org).
 -> QUIT
<-  221 2.0.0 Bye
=== Connection closed with remote host.